diff --git a/packages/react-devtools-core/src/backend.js b/packages/react-devtools-core/src/backend.js
index fa236c2c6b728..e84a07fd3e16f 100644
--- a/packages/react-devtools-core/src/backend.js
+++ b/packages/react-devtools-core/src/backend.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import Agent from 'react-devtools-shared/src/backend/agent';
 import Bridge from 'react-devtools-shared/src/bridge';
diff --git a/packages/react-devtools-core/src/editor.js b/packages/react-devtools-core/src/editor.js
index 55ce120b56ef8..bbe3fa63d9857 100644
--- a/packages/react-devtools-core/src/editor.js
+++ b/packages/react-devtools-core/src/editor.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {existsSync} from 'fs';
 import {basename, join, isAbsolute} from 'path';
diff --git a/packages/react-devtools-core/src/standalone.js b/packages/react-devtools-core/src/standalone.js
index e286de9660a6b..1516fa1c77b51 100644
--- a/packages/react-devtools-core/src/standalone.js
+++ b/packages/react-devtools-core/src/standalone.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {createElement} from 'react';
 import {
diff --git a/packages/react-devtools-extensions/flow-typed/chrome.js b/packages/react-devtools-extensions/flow-typed/chrome.js
index c95e6d90653f6..501080bb8bdd7 100644
--- a/packages/react-devtools-extensions/flow-typed/chrome.js
+++ b/packages/react-devtools-extensions/flow-typed/chrome.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 'use strict';
 
diff --git a/packages/react-devtools-shared/src/__tests__/bridge-test.js b/packages/react-devtools-shared/src/__tests__/bridge-test.js
index ddd9e044e9fd7..3d24997b60fe7 100644
--- a/packages/react-devtools-shared/src/__tests__/bridge-test.js
+++ b/packages/react-devtools-shared/src/__tests__/bridge-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 describe('Bridge', () => {
   let Bridge;
diff --git a/packages/react-devtools-shared/src/__tests__/console-test.js b/packages/react-devtools-shared/src/__tests__/console-test.js
index 3985ac9b2e705..c858a755f9eef 100644
--- a/packages/react-devtools-shared/src/__tests__/console-test.js
+++ b/packages/react-devtools-shared/src/__tests__/console-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 describe('console', () => {
   let React;
diff --git a/packages/react-devtools-shared/src/__tests__/inspectedElementContext-test.js b/packages/react-devtools-shared/src/__tests__/inspectedElementContext-test.js
index cd62dcd19d015..73a3e916c2836 100644
--- a/packages/react-devtools-shared/src/__tests__/inspectedElementContext-test.js
+++ b/packages/react-devtools-shared/src/__tests__/inspectedElementContext-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import typeof ReactTestRenderer from 'react-test-renderer';
 import type {GetInspectedElementPath} from 'react-devtools-shared/src/devtools/views/Components/InspectedElementContext';
diff --git a/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js b/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
index 2dbc8867e0b49..641b5cf0067da 100644
--- a/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
+++ b/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {InspectedElementPayload} from 'react-devtools-shared/src/backend/types';
 import type {DehydratedData} from 'react-devtools-shared/src/devtools/views/Components/types';
diff --git a/packages/react-devtools-shared/src/__tests__/legacy/storeLegacy-v15-test.js b/packages/react-devtools-shared/src/__tests__/legacy/storeLegacy-v15-test.js
index dd4004f64a3e0..ccc0d895806d2 100644
--- a/packages/react-devtools-shared/src/__tests__/legacy/storeLegacy-v15-test.js
+++ b/packages/react-devtools-shared/src/__tests__/legacy/storeLegacy-v15-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 describe('Store (legacy)', () => {
   let React;
diff --git a/packages/react-devtools-shared/src/__tests__/ownersListContext-test.js b/packages/react-devtools-shared/src/__tests__/ownersListContext-test.js
index abd9dd3b61bbe..b39da70632065 100644
--- a/packages/react-devtools-shared/src/__tests__/ownersListContext-test.js
+++ b/packages/react-devtools-shared/src/__tests__/ownersListContext-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import typeof ReactTestRenderer from 'react-test-renderer';
 import type {Element} from 'react-devtools-shared/src/devtools/views/Components/types';
diff --git a/packages/react-devtools-shared/src/__tests__/profilerContext-test.js b/packages/react-devtools-shared/src/__tests__/profilerContext-test.js
index c61cb9b43155c..35bc06e58914b 100644
--- a/packages/react-devtools-shared/src/__tests__/profilerContext-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilerContext-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import typeof ReactTestRenderer from 'react-test-renderer';
 import type {FrontendBridge} from 'react-devtools-shared/src/bridge';
diff --git a/packages/react-devtools-shared/src/__tests__/profilerStore-test.js b/packages/react-devtools-shared/src/__tests__/profilerStore-test.js
index 22b8150e2ffae..6fcd1efd31eaf 100644
--- a/packages/react-devtools-shared/src/__tests__/profilerStore-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilerStore-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type Store from 'react-devtools-shared/src/devtools/store';
 
diff --git a/packages/react-devtools-shared/src/__tests__/profilingCache-test.js b/packages/react-devtools-shared/src/__tests__/profilingCache-test.js
index 9e5a9b48bfb4d..f99be7bc3b52d 100644
--- a/packages/react-devtools-shared/src/__tests__/profilingCache-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilingCache-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import typeof ReactTestRenderer from 'react-test-renderer';
 import type {FrontendBridge} from 'react-devtools-shared/src/bridge';
diff --git a/packages/react-devtools-shared/src/__tests__/profilingCharts-test.js b/packages/react-devtools-shared/src/__tests__/profilingCharts-test.js
index bc135c5a18c64..802a7421575e6 100644
--- a/packages/react-devtools-shared/src/__tests__/profilingCharts-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilingCharts-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import typeof TestRendererType from 'react-test-renderer';
 import type Store from 'react-devtools-shared/src/devtools/store';
diff --git a/packages/react-devtools-shared/src/__tests__/profilingCommitTreeBuilder-test.js b/packages/react-devtools-shared/src/__tests__/profilingCommitTreeBuilder-test.js
index 2665434972b6f..c4bccdef90b3e 100644
--- a/packages/react-devtools-shared/src/__tests__/profilingCommitTreeBuilder-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilingCommitTreeBuilder-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import typeof TestRendererType from 'react-test-renderer';
 import type Store from 'react-devtools-shared/src/devtools/store';
diff --git a/packages/react-devtools-shared/src/__tests__/profilingUtils-test.js b/packages/react-devtools-shared/src/__tests__/profilingUtils-test.js
index 0bf4bcf7b8e08..5cf07cf472eeb 100644
--- a/packages/react-devtools-shared/src/__tests__/profilingUtils-test.js
+++ b/packages/react-devtools-shared/src/__tests__/profilingUtils-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 describe('profiling utils', () => {
   let utils;
diff --git a/packages/react-devtools-shared/src/__tests__/setupTests.js b/packages/react-devtools-shared/src/__tests__/setupTests.js
index d845003ebce77..39ea77e81af01 100644
--- a/packages/react-devtools-shared/src/__tests__/setupTests.js
+++ b/packages/react-devtools-shared/src/__tests__/setupTests.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {
   BackendBridge,
diff --git a/packages/react-devtools-shared/src/__tests__/store-test.js b/packages/react-devtools-shared/src/__tests__/store-test.js
index fdcc128494ff0..06f9c69ae14e0 100644
--- a/packages/react-devtools-shared/src/__tests__/store-test.js
+++ b/packages/react-devtools-shared/src/__tests__/store-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 describe('Store', () => {
   let React;
diff --git a/packages/react-devtools-shared/src/__tests__/storeComponentFilters-test.js b/packages/react-devtools-shared/src/__tests__/storeComponentFilters-test.js
index a5dcfdb5a32db..341e06b04d57e 100644
--- a/packages/react-devtools-shared/src/__tests__/storeComponentFilters-test.js
+++ b/packages/react-devtools-shared/src/__tests__/storeComponentFilters-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {FrontendBridge} from 'react-devtools-shared/src/bridge';
 import type Store from 'react-devtools-shared/src/devtools/store';
diff --git a/packages/react-devtools-shared/src/__tests__/storeOwners-test.js b/packages/react-devtools-shared/src/__tests__/storeOwners-test.js
index 0af23c35c813b..c380d8b91ad3b 100644
--- a/packages/react-devtools-shared/src/__tests__/storeOwners-test.js
+++ b/packages/react-devtools-shared/src/__tests__/storeOwners-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 const {printOwnersList} = require('../devtools/utils');
 
diff --git a/packages/react-devtools-shared/src/__tests__/storeStressSync-test.js b/packages/react-devtools-shared/src/__tests__/storeStressSync-test.js
index 9ee05f6eba90a..4b3acfcd9396a 100644
--- a/packages/react-devtools-shared/src/__tests__/storeStressSync-test.js
+++ b/packages/react-devtools-shared/src/__tests__/storeStressSync-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 describe('StoreStress (Sync Mode)', () => {
   let React;
diff --git a/packages/react-devtools-shared/src/__tests__/storeStressTestConcurrent-test.js b/packages/react-devtools-shared/src/__tests__/storeStressTestConcurrent-test.js
index 8e72f41f1a9c7..b56c058d4bf09 100644
--- a/packages/react-devtools-shared/src/__tests__/storeStressTestConcurrent-test.js
+++ b/packages/react-devtools-shared/src/__tests__/storeStressTestConcurrent-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 describe('StoreStressConcurrent', () => {
   let React;
diff --git a/packages/react-devtools-shared/src/__tests__/treeContext-test.js b/packages/react-devtools-shared/src/__tests__/treeContext-test.js
index 1834e615c48e8..67e7ddf01a654 100644
--- a/packages/react-devtools-shared/src/__tests__/treeContext-test.js
+++ b/packages/react-devtools-shared/src/__tests__/treeContext-test.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import typeof ReactTestRenderer from 'react-test-renderer';
 import type {FrontendBridge} from 'react-devtools-shared/src/bridge';
diff --git a/packages/react-devtools-shared/src/__tests__/utils.js b/packages/react-devtools-shared/src/__tests__/utils.js
index bd652d7381c65..52d3a4d44fcae 100644
--- a/packages/react-devtools-shared/src/__tests__/utils.js
+++ b/packages/react-devtools-shared/src/__tests__/utils.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import typeof ReactTestRenderer from 'react-test-renderer';
 
diff --git a/packages/react-devtools-shared/src/backend/NativeStyleEditor/resolveBoxStyle.js b/packages/react-devtools-shared/src/backend/NativeStyleEditor/resolveBoxStyle.js
index 5b8005fab9783..ae39e8f338b1a 100644
--- a/packages/react-devtools-shared/src/backend/NativeStyleEditor/resolveBoxStyle.js
+++ b/packages/react-devtools-shared/src/backend/NativeStyleEditor/resolveBoxStyle.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {BoxStyle} from './types';
 
diff --git a/packages/react-devtools-shared/src/backend/NativeStyleEditor/setupNativeStyleEditor.js b/packages/react-devtools-shared/src/backend/NativeStyleEditor/setupNativeStyleEditor.js
index 7f72b8cbf3865..afa189f1227a0 100644
--- a/packages/react-devtools-shared/src/backend/NativeStyleEditor/setupNativeStyleEditor.js
+++ b/packages/react-devtools-shared/src/backend/NativeStyleEditor/setupNativeStyleEditor.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import Agent from 'react-devtools-shared/src/backend/agent';
 import resolveBoxStyle from './resolveBoxStyle';
diff --git a/packages/react-devtools-shared/src/backend/NativeStyleEditor/types.js b/packages/react-devtools-shared/src/backend/NativeStyleEditor/types.js
index f7040cb8d3049..f20d0d016d850 100644
--- a/packages/react-devtools-shared/src/backend/NativeStyleEditor/types.js
+++ b/packages/react-devtools-shared/src/backend/NativeStyleEditor/types.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 export type BoxStyle = $ReadOnly<{|
   bottom: number,
diff --git a/packages/react-devtools-shared/src/backend/agent.js b/packages/react-devtools-shared/src/backend/agent.js
index ef11427fd3e97..3bbec8416ab3a 100644
--- a/packages/react-devtools-shared/src/backend/agent.js
+++ b/packages/react-devtools-shared/src/backend/agent.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import EventEmitter from 'events';
 import throttle from 'lodash.throttle';
diff --git a/packages/react-devtools-shared/src/backend/console.js b/packages/react-devtools-shared/src/backend/console.js
index 4d18afbd25685..7d6c22abee1e6 100644
--- a/packages/react-devtools-shared/src/backend/console.js
+++ b/packages/react-devtools-shared/src/backend/console.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {getInternalReactConstants} from './renderer';
 import describeComponentFrame from './describeComponentFrame';
diff --git a/packages/react-devtools-shared/src/backend/describeComponentFrame.js b/packages/react-devtools-shared/src/backend/describeComponentFrame.js
index 849e9bc1f4da4..20034df83dff2 100644
--- a/packages/react-devtools-shared/src/backend/describeComponentFrame.js
+++ b/packages/react-devtools-shared/src/backend/describeComponentFrame.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 // This file was forked from the React GitHub repo:
 // https://github.com/raw/facebook/react/master/packages/shared/describeComponentFrame.js
diff --git a/packages/react-devtools-shared/src/backend/index.js b/packages/react-devtools-shared/src/backend/index.js
index 98aece0a856f8..2c57627f31117 100644
--- a/packages/react-devtools-shared/src/backend/index.js
+++ b/packages/react-devtools-shared/src/backend/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import Agent from './agent';
 
diff --git a/packages/react-devtools-shared/src/backend/legacy/renderer.js b/packages/react-devtools-shared/src/backend/legacy/renderer.js
index 59a20cc9a77fc..94db3b25ada8e 100644
--- a/packages/react-devtools-shared/src/backend/legacy/renderer.js
+++ b/packages/react-devtools-shared/src/backend/legacy/renderer.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {
   ElementTypeClass,
diff --git a/packages/react-devtools-shared/src/backend/legacy/utils.js b/packages/react-devtools-shared/src/backend/legacy/utils.js
index 776fa6ae26052..a2f7a440ed457 100644
--- a/packages/react-devtools-shared/src/backend/legacy/utils.js
+++ b/packages/react-devtools-shared/src/backend/legacy/utils.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {InternalInstance} from './renderer';
 
diff --git a/packages/react-devtools-shared/src/backend/renderer.js b/packages/react-devtools-shared/src/backend/renderer.js
index 904e99905b5cc..e8a6d8ee8d5af 100644
--- a/packages/react-devtools-shared/src/backend/renderer.js
+++ b/packages/react-devtools-shared/src/backend/renderer.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {gte} from 'semver';
 import {
diff --git a/packages/react-devtools-shared/src/backend/types.js b/packages/react-devtools-shared/src/backend/types.js
index 4f0f7e552cfd4..87f9fc14a5f6f 100644
--- a/packages/react-devtools-shared/src/backend/types.js
+++ b/packages/react-devtools-shared/src/backend/types.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {ReactContext} from 'shared/ReactTypes';
 import type {Source} from 'shared/ReactElementType';
diff --git a/packages/react-devtools-shared/src/backend/utils.js b/packages/react-devtools-shared/src/backend/utils.js
index 6b5b8999d91bc..04c6d102870f4 100644
--- a/packages/react-devtools-shared/src/backend/utils.js
+++ b/packages/react-devtools-shared/src/backend/utils.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {dehydrate} from '../hydration';
 
diff --git a/packages/react-devtools-shared/src/backend/views/Highlighter/Highlighter.js b/packages/react-devtools-shared/src/backend/views/Highlighter/Highlighter.js
index 8a62e828a866c..b547913cda46d 100644
--- a/packages/react-devtools-shared/src/backend/views/Highlighter/Highlighter.js
+++ b/packages/react-devtools-shared/src/backend/views/Highlighter/Highlighter.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import Overlay from './Overlay';
 
diff --git a/packages/react-devtools-shared/src/backend/views/Highlighter/Overlay.js b/packages/react-devtools-shared/src/backend/views/Highlighter/Overlay.js
index 30bd10e261b1b..4cf78b264cd87 100644
--- a/packages/react-devtools-shared/src/backend/views/Highlighter/Overlay.js
+++ b/packages/react-devtools-shared/src/backend/views/Highlighter/Overlay.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import assign from 'object-assign';
 
diff --git a/packages/react-devtools-shared/src/backend/views/Highlighter/index.js b/packages/react-devtools-shared/src/backend/views/Highlighter/index.js
index a0c25b2efdfc9..2080ed4d78ca7 100644
--- a/packages/react-devtools-shared/src/backend/views/Highlighter/index.js
+++ b/packages/react-devtools-shared/src/backend/views/Highlighter/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import memoize from 'memoize-one';
 import throttle from 'lodash.throttle';
diff --git a/packages/react-devtools-shared/src/bridge.js b/packages/react-devtools-shared/src/bridge.js
index fa9b2c76eb743..4d88747992f69 100644
--- a/packages/react-devtools-shared/src/bridge.js
+++ b/packages/react-devtools-shared/src/bridge.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import EventEmitter from 'events';
 
diff --git a/packages/react-devtools-shared/src/constants.js b/packages/react-devtools-shared/src/constants.js
index 73165ce456cc3..00956d28ff8fb 100644
--- a/packages/react-devtools-shared/src/constants.js
+++ b/packages/react-devtools-shared/src/constants.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 // Flip this flag to true to enable verbose console debug logging.
 export const __DEBUG__ = false;
diff --git a/packages/react-devtools-shared/src/devtools/ProfilerStore.js b/packages/react-devtools-shared/src/devtools/ProfilerStore.js
index ca1f44ee39d05..76f58823bef3a 100644
--- a/packages/react-devtools-shared/src/devtools/ProfilerStore.js
+++ b/packages/react-devtools-shared/src/devtools/ProfilerStore.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import EventEmitter from 'events';
 import {prepareProfilingDataFrontendFromBackendAndStore} from './views/Profiler/utils';
diff --git a/packages/react-devtools-shared/src/devtools/ProfilingCache.js b/packages/react-devtools-shared/src/devtools/ProfilingCache.js
index d84b6dd036034..03e156cdf0f9d 100644
--- a/packages/react-devtools-shared/src/devtools/ProfilingCache.js
+++ b/packages/react-devtools-shared/src/devtools/ProfilingCache.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import ProfilerStore from './ProfilerStore';
 import {
diff --git a/packages/react-devtools-shared/src/devtools/cache.js b/packages/react-devtools-shared/src/devtools/cache.js
index 720ea17e9dc18..084c45f000444 100644
--- a/packages/react-devtools-shared/src/devtools/cache.js
+++ b/packages/react-devtools-shared/src/devtools/cache.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {createContext} from 'react';
 
diff --git a/packages/react-devtools-shared/src/devtools/index.js b/packages/react-devtools-shared/src/devtools/index.js
index df7a644d16833..a15999478f1d9 100644
--- a/packages/react-devtools-shared/src/devtools/index.js
+++ b/packages/react-devtools-shared/src/devtools/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {FrontendBridge} from 'react-devtools-shared/src/bridge';
 
diff --git a/packages/react-devtools-shared/src/devtools/store.js b/packages/react-devtools-shared/src/devtools/store.js
index 31756d573f098..68264ddeb464b 100644
--- a/packages/react-devtools-shared/src/devtools/store.js
+++ b/packages/react-devtools-shared/src/devtools/store.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import EventEmitter from 'events';
 import {inspect} from 'util';
diff --git a/packages/react-devtools-shared/src/devtools/utils.js b/packages/react-devtools-shared/src/devtools/utils.js
index 2979c640b2ec3..aaffcad56e272 100644
--- a/packages/react-devtools-shared/src/devtools/utils.js
+++ b/packages/react-devtools-shared/src/devtools/utils.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {Element} from './views/Components/types';
 import type Store from './store';
diff --git a/packages/react-devtools-shared/src/devtools/views/Button.js b/packages/react-devtools-shared/src/devtools/views/Button.js
index bb55bca22f69c..88787ead03867 100644
--- a/packages/react-devtools-shared/src/devtools/views/Button.js
+++ b/packages/react-devtools-shared/src/devtools/views/Button.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 import Tooltip from '@reach/tooltip';
diff --git a/packages/react-devtools-shared/src/devtools/views/ButtonIcon.js b/packages/react-devtools-shared/src/devtools/views/ButtonIcon.js
index eea3a5d0d72f0..5edc6821bd3fe 100644
--- a/packages/react-devtools-shared/src/devtools/views/ButtonIcon.js
+++ b/packages/react-devtools-shared/src/devtools/views/ButtonIcon.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 import styles from './ButtonIcon.css';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/Badge.js b/packages/react-devtools-shared/src/devtools/views/Components/Badge.js
index 845c06c089c71..660e4ab4002be 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/Badge.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/Badge.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment} from 'react';
 import {
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/Components.js b/packages/react-devtools-shared/src/devtools/views/Components/Components.js
index 503470a85a7e8..107ef1393ef31 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/Components.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/Components.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Suspense} from 'react';
 import Tree from './Tree';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/EditableValue.js b/packages/react-devtools-shared/src/devtools/views/Components/EditableValue.js
index 116902b9f31e0..46bc177763fe0 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/EditableValue.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/EditableValue.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useCallback, useRef, useState} from 'react';
 import Button from '../Button';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/Element.js b/packages/react-devtools-shared/src/devtools/views/Components/Element.js
index 78e0a02bb560c..56587112477a3 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/Element.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/Element.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext, useMemo, useState} from 'react';
 import Store from 'react-devtools-shared/src/devtools/store';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/ExpandCollapseToggle.js b/packages/react-devtools-shared/src/devtools/views/Components/ExpandCollapseToggle.js
index d47357839c105..234930c900b12 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/ExpandCollapseToggle.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/ExpandCollapseToggle.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 import Button from '../Button';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/HocBadges.js b/packages/react-devtools-shared/src/devtools/views/Components/HocBadges.js
index 0e57e7977266e..6cf25ef234a8a 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/HocBadges.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/HocBadges.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 import {
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/HooksTree.js b/packages/react-devtools-shared/src/devtools/views/Components/HooksTree.js
index f8678f39326ce..2fd4f95cbdb4f 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/HooksTree.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/HooksTree.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {copy} from 'clipboard-js';
 import React, {useCallback, useContext, useState} from 'react';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/InspectHostNodesToggle.js b/packages/react-devtools-shared/src/devtools/views/Components/InspectHostNodesToggle.js
index bd2e6eee4036d..2bbb704e527f6 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/InspectHostNodesToggle.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/InspectHostNodesToggle.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext, useEffect, useState} from 'react';
 import {BridgeContext} from '../context';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/InspectedElementContext.js b/packages/react-devtools-shared/src/devtools/views/Components/InspectedElementContext.js
index 43c62bc1f6465..f58671eb4e3f9 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/InspectedElementContext.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/InspectedElementContext.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   createContext,
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/InspectedElementTree.js b/packages/react-devtools-shared/src/devtools/views/Components/InspectedElementTree.js
index 8615166280aec..1acc27af5a82c 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/InspectedElementTree.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/InspectedElementTree.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {copy} from 'clipboard-js';
 import React, {useCallback} from 'react';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/KeyValue.js b/packages/react-devtools-shared/src/devtools/views/Components/KeyValue.js
index 6bbe9e2d81401..8844a13f6807d 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/KeyValue.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/KeyValue.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useEffect, useRef, useState} from 'react';
 import type {Element} from 'react';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/AutoSizeInput.js b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/AutoSizeInput.js
index a3552ef588fbc..9613f5e150951 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/AutoSizeInput.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/AutoSizeInput.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useLayoutEffect, useRef} from 'react';
 import styles from './AutoSizeInput.css';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/LayoutViewer.js b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/LayoutViewer.js
index f322d425e3c99..22287647c8b16 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/LayoutViewer.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/LayoutViewer.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 import styles from './LayoutViewer.css';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/StyleEditor.js b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/StyleEditor.js
index 64c0b6db53a6c..d48c96e977795 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/StyleEditor.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/StyleEditor.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useContext, useMemo, useRef, useState} from 'react';
 import {unstable_batchedUpdates as batchedUpdates} from 'react-dom';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/context.js b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/context.js
index ed2492230c929..a3a2bcc799132 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/context.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/context.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   createContext,
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/index.js b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/index.js
index 2a87011c5c8fa..d9032e2f61ac4 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/index.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext, useMemo} from 'react';
 import {StoreContext} from 'react-devtools-shared/src/devtools/views/context';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/types.js b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/types.js
index 8d2bdbfa1c080..8a24e808a1e4f 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/types.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/types.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {
   Layout as LayoutBackend,
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/OwnersListContext.js b/packages/react-devtools-shared/src/devtools/views/Components/OwnersListContext.js
index 9d9fa75cc58f9..c1faab02da1ef 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/OwnersListContext.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/OwnersListContext.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {createContext, useCallback, useContext, useEffect} from 'react';
 import {createResource} from '../../cache';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/OwnersStack.js b/packages/react-devtools-shared/src/devtools/views/Components/OwnersStack.js
index 5abf1b887e46c..669a12e349d34 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/OwnersStack.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/OwnersStack.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 import React, {
   Fragment,
   useCallback,
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/SearchInput.js b/packages/react-devtools-shared/src/devtools/views/Components/SearchInput.js
index 76964e4cf5f9e..a170582506bae 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/SearchInput.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/SearchInput.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext, useEffect, useRef} from 'react';
 import {TreeDispatcherContext, TreeStateContext} from './TreeContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/SelectedElement.js b/packages/react-devtools-shared/src/devtools/views/Components/SelectedElement.js
index 32d7cbfb283b8..a553f494af1a9 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/SelectedElement.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/SelectedElement.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext} from 'react';
 import {TreeDispatcherContext, TreeStateContext} from './TreeContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/SelectedTreeHighlight.js b/packages/react-devtools-shared/src/devtools/views/Components/SelectedTreeHighlight.js
index 76de2d420fd5c..ea94dbff78c0f 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/SelectedTreeHighlight.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/SelectedTreeHighlight.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useContext, useMemo} from 'react';
 import {TreeStateContext} from './TreeContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/Tree.js b/packages/react-devtools-shared/src/devtools/views/Components/Tree.js
index 81e2b53023892..2c65df8fa1999 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/Tree.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/Tree.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   Fragment,
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/TreeContext.js b/packages/react-devtools-shared/src/devtools/views/Components/TreeContext.js
index 5fa663b7eda79..f3f3c19948070 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/TreeContext.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/TreeContext.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 // This context combines tree/selection state, search, and the owners stack.
 // These values are managed together because changes in one often impact the others.
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/TreeFocusedContext.js b/packages/react-devtools-shared/src/devtools/views/Components/TreeFocusedContext.js
index f5a266ae63989..8461f97f1bb80 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/TreeFocusedContext.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/TreeFocusedContext.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {createContext} from 'react';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/ViewElementSourceContext.js b/packages/react-devtools-shared/src/devtools/views/Components/ViewElementSourceContext.js
index ffb03c584f015..3dc061c354567 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/ViewElementSourceContext.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/ViewElementSourceContext.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {createContext} from 'react';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Components/types.js b/packages/react-devtools-shared/src/devtools/views/Components/types.js
index 1a7c4af0360b2..547baeb9ec402 100644
--- a/packages/react-devtools-shared/src/devtools/views/Components/types.js
+++ b/packages/react-devtools-shared/src/devtools/views/Components/types.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {Source} from 'shared/ReactElementType';
 import type {
diff --git a/packages/react-devtools-shared/src/devtools/views/DevTools.js b/packages/react-devtools-shared/src/devtools/views/DevTools.js
index 16e15aad07685..f73e0848e6c34 100644
--- a/packages/react-devtools-shared/src/devtools/views/DevTools.js
+++ b/packages/react-devtools-shared/src/devtools/views/DevTools.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 // Reach styles need to come before any component styles.
 // This makes overridding the styles simpler.
diff --git a/packages/react-devtools-shared/src/devtools/views/ErrorBoundary.js b/packages/react-devtools-shared/src/devtools/views/ErrorBoundary.js
index 29a3e280f654f..2c8cd35b31026 100644
--- a/packages/react-devtools-shared/src/devtools/views/ErrorBoundary.js
+++ b/packages/react-devtools-shared/src/devtools/views/ErrorBoundary.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Component} from 'react';
 import styles from './ErrorBoundary.css';
diff --git a/packages/react-devtools-shared/src/devtools/views/Icon.js b/packages/react-devtools-shared/src/devtools/views/Icon.js
index 69813c9ee6181..e29f22e07f5a6 100644
--- a/packages/react-devtools-shared/src/devtools/views/Icon.js
+++ b/packages/react-devtools-shared/src/devtools/views/Icon.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 import styles from './Icon.css';
diff --git a/packages/react-devtools-shared/src/devtools/views/ModalDialog.js b/packages/react-devtools-shared/src/devtools/views/ModalDialog.js
index 438f22c939f44..bf9eada1efdf8 100644
--- a/packages/react-devtools-shared/src/devtools/views/ModalDialog.js
+++ b/packages/react-devtools-shared/src/devtools/views/ModalDialog.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   createContext,
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/ChartNode.js b/packages/react-devtools-shared/src/devtools/views/Profiler/ChartNode.js
index 08021eb5483c5..4a85d18fe8478 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/ChartNode.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/ChartNode.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/ClearProfilingDataButton.js b/packages/react-devtools-shared/src/devtools/views/Profiler/ClearProfilingDataButton.js
index 6d223fb5d89a4..92a2b7519a62b 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/ClearProfilingDataButton.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/ClearProfilingDataButton.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext} from 'react';
 import {ProfilerContext} from './ProfilerContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitFlamegraph.js b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitFlamegraph.js
index 508138755bbdf..bade1502241d4 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitFlamegraph.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitFlamegraph.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {forwardRef, useCallback, useContext, useMemo} from 'react';
 import AutoSizer from 'react-virtualized-auto-sizer';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitFlamegraphListItem.js b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitFlamegraphListItem.js
index be16491a63f60..bcaa76b05376d 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitFlamegraphListItem.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitFlamegraphListItem.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, memo, useCallback, useContext} from 'react';
 import {areEqual} from 'react-window';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitRanked.js b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitRanked.js
index d001cf8c135b0..f230f67359920 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitRanked.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitRanked.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext, useMemo} from 'react';
 import AutoSizer from 'react-virtualized-auto-sizer';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitRankedListItem.js b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitRankedListItem.js
index c2854d84cdc11..ba1edaa91f660 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitRankedListItem.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitRankedListItem.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {memo, useCallback, useContext} from 'react';
 import {areEqual} from 'react-window';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitTreeBuilder.js b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitTreeBuilder.js
index 0da74163179f5..085ec2a6dd2da 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/CommitTreeBuilder.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/CommitTreeBuilder.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {
   __DEBUG__,
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/FlamegraphChartBuilder.js b/packages/react-devtools-shared/src/devtools/views/Profiler/FlamegraphChartBuilder.js
index c1a2f7f56dc56..500549db01260 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/FlamegraphChartBuilder.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/FlamegraphChartBuilder.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {
   ElementTypeForwardRef,
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/InteractionListItem.js b/packages/react-devtools-shared/src/devtools/views/Profiler/InteractionListItem.js
index 6f0f81f6523f2..0e38808bb18c1 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/InteractionListItem.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/InteractionListItem.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {memo, useCallback} from 'react';
 import {areEqual} from 'react-window';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/Interactions.js b/packages/react-devtools-shared/src/devtools/views/Profiler/Interactions.js
index 60cf04acf79fb..e3b9b2a8e77f0 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/Interactions.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/Interactions.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext, useMemo} from 'react';
 import AutoSizer from 'react-virtualized-auto-sizer';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/InteractionsChartBuilder.js b/packages/react-devtools-shared/src/devtools/views/Profiler/InteractionsChartBuilder.js
index a336e9c1edf26..90ebfade4cd9f 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/InteractionsChartBuilder.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/InteractionsChartBuilder.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import ProfilerStore from 'react-devtools-shared/src/devtools/ProfilerStore';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/NoCommitData.js b/packages/react-devtools-shared/src/devtools/views/Profiler/NoCommitData.js
index 32b2860fbcc64..314f397016fa8 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/NoCommitData.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/NoCommitData.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/NoInteractions.js b/packages/react-devtools-shared/src/devtools/views/Profiler/NoInteractions.js
index 6254a447efebb..993d7136ac036 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/NoInteractions.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/NoInteractions.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/Profiler.js b/packages/react-devtools-shared/src/devtools/views/Profiler/Profiler.js
index eee78953f871c..868f4add55e8c 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/Profiler.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/Profiler.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext} from 'react';
 import {ModalDialog} from '../ModalDialog';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/ProfilerContext.js b/packages/react-devtools-shared/src/devtools/views/Profiler/ProfilerContext.js
index ed8f0d538ad32..e94d3e583ef90 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/ProfilerContext.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/ProfilerContext.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   createContext,
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/ProfilingImportExportButtons.js b/packages/react-devtools-shared/src/devtools/views/Profiler/ProfilingImportExportButtons.js
index 87187b68b9355..376afcf45e883 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/ProfilingImportExportButtons.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/ProfilingImportExportButtons.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext, useCallback, useRef} from 'react';
 import {ProfilerContext} from './ProfilerContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/RankedChartBuilder.js b/packages/react-devtools-shared/src/devtools/views/Profiler/RankedChartBuilder.js
index c5c8b4cea731a..e3f6c178a5b03 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/RankedChartBuilder.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/RankedChartBuilder.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {
   ElementTypeForwardRef,
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/RecordToggle.js b/packages/react-devtools-shared/src/devtools/views/Profiler/RecordToggle.js
index 8f2052d12ee36..db03e74aa85ee 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/RecordToggle.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/RecordToggle.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useContext} from 'react';
 import Button from '../Button';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/ReloadAndProfileButton.js b/packages/react-devtools-shared/src/devtools/views/Profiler/ReloadAndProfileButton.js
index adf05439fccc8..a8cefc1981935 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/ReloadAndProfileButton.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/ReloadAndProfileButton.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext, useMemo} from 'react';
 import Button from '../Button';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/RootSelector.js b/packages/react-devtools-shared/src/devtools/views/Profiler/RootSelector.js
index 5b93fbf4615b7..b911faff35b9a 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/RootSelector.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/RootSelector.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useCallback, useContext} from 'react';
 import {ProfilerContext} from './ProfilerContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarCommitInfo.js b/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarCommitInfo.js
index 964ba7548e512..735065f2809cc 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarCommitInfo.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarCommitInfo.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext} from 'react';
 import {ProfilerContext} from './ProfilerContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarInteractions.js b/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarInteractions.js
index c511e13c3f7ab..6e98192916494 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarInteractions.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarInteractions.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext} from 'react';
 import {ProfilerContext} from './ProfilerContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarSelectedFiberInfo.js b/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarSelectedFiberInfo.js
index cd14bc3fd39b2..595d0e0e17439 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarSelectedFiberInfo.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/SidebarSelectedFiberInfo.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext} from 'react';
 import ProfilerStore from 'react-devtools-shared/src/devtools/ProfilerStore';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotCommitList.js b/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotCommitList.js
index 2ffef4fa5744f..208d4ed5178a9 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotCommitList.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotCommitList.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useEffect, useMemo, useRef, useState} from 'react';
 import AutoSizer from 'react-virtualized-auto-sizer';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotCommitListItem.js b/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotCommitListItem.js
index c1ae6f4e02cf6..07e08efd8b6dd 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotCommitListItem.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotCommitListItem.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {memo, useCallback} from 'react';
 import {areEqual} from 'react-window';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotSelector.js b/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotSelector.js
index 9e8d6fdf0caa8..5d9424211af8f 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotSelector.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotSelector.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useCallback, useContext, useMemo} from 'react';
 import Button from '../Button';
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/constants.js b/packages/react-devtools-shared/src/devtools/views/Profiler/constants.js
index 664dfe354b349..fd6b4365f23ac 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/constants.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/constants.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 export const barWidthThreshold = 2;
 export const interactionCommitSize = 10;
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/types.js b/packages/react-devtools-shared/src/devtools/views/Profiler/types.js
index 2afd9826e362e..4156aa592c4e8 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/types.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/types.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import type {ElementType} from 'react-devtools-shared/src/types';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Profiler/utils.js b/packages/react-devtools-shared/src/devtools/views/Profiler/utils.js
index 92dce7e48c390..db6b0652c870d 100644
--- a/packages/react-devtools-shared/src/devtools/views/Profiler/utils.js
+++ b/packages/react-devtools-shared/src/devtools/views/Profiler/utils.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {PROFILER_EXPORT_VERSION} from 'react-devtools-shared/src/constants';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/ReactLogo.js b/packages/react-devtools-shared/src/devtools/views/ReactLogo.js
index bcc50d2e4b39b..5ae9e09e9d41c 100644
--- a/packages/react-devtools-shared/src/devtools/views/ReactLogo.js
+++ b/packages/react-devtools-shared/src/devtools/views/ReactLogo.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Settings/ComponentsSettings.js b/packages/react-devtools-shared/src/devtools/views/Settings/ComponentsSettings.js
index 8ef4e81869d56..1d4697abe52ed 100644
--- a/packages/react-devtools-shared/src/devtools/views/Settings/ComponentsSettings.js
+++ b/packages/react-devtools-shared/src/devtools/views/Settings/ComponentsSettings.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   useCallback,
diff --git a/packages/react-devtools-shared/src/devtools/views/Settings/GeneralSettings.js b/packages/react-devtools-shared/src/devtools/views/Settings/GeneralSettings.js
index 25e9dc3320cd9..c896a14152f10 100644
--- a/packages/react-devtools-shared/src/devtools/views/Settings/GeneralSettings.js
+++ b/packages/react-devtools-shared/src/devtools/views/Settings/GeneralSettings.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useContext} from 'react';
 import {SettingsContext} from './SettingsContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/Settings/ProfilerSettings.js b/packages/react-devtools-shared/src/devtools/views/Settings/ProfilerSettings.js
index 5a8e639a01adf..7265154229442 100644
--- a/packages/react-devtools-shared/src/devtools/views/Settings/ProfilerSettings.js
+++ b/packages/react-devtools-shared/src/devtools/views/Settings/ProfilerSettings.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext, useMemo, useRef} from 'react';
 import {useSubscription} from '../hooks';
diff --git a/packages/react-devtools-shared/src/devtools/views/Settings/SettingsContext.js b/packages/react-devtools-shared/src/devtools/views/Settings/SettingsContext.js
index cf640f7a1ec4c..ed536874ce08b 100644
--- a/packages/react-devtools-shared/src/devtools/views/Settings/SettingsContext.js
+++ b/packages/react-devtools-shared/src/devtools/views/Settings/SettingsContext.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   createContext,
diff --git a/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModal.js b/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModal.js
index e383bd6e9b0d1..5ac993a919248 100644
--- a/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModal.js
+++ b/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModal.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   useCallback,
diff --git a/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModalContext.js b/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModalContext.js
index 698400cb8dd18..718656f5788e9 100644
--- a/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModalContext.js
+++ b/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModalContext.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {createContext, useMemo, useState} from 'react';
 
diff --git a/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModalContextToggle.js b/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModalContextToggle.js
index 11beb3cdfbba9..465f835a05aa3 100644
--- a/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModalContextToggle.js
+++ b/packages/react-devtools-shared/src/devtools/views/Settings/SettingsModalContextToggle.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback, useContext, useMemo} from 'react';
 import {SettingsModalContext} from './SettingsModalContext';
diff --git a/packages/react-devtools-shared/src/devtools/views/ShowWelcomeToTheNewDevToolsDialog.js b/packages/react-devtools-shared/src/devtools/views/ShowWelcomeToTheNewDevToolsDialog.js
index 0fb270999652a..a14f01a3cc434 100644
--- a/packages/react-devtools-shared/src/devtools/views/ShowWelcomeToTheNewDevToolsDialog.js
+++ b/packages/react-devtools-shared/src/devtools/views/ShowWelcomeToTheNewDevToolsDialog.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext, useEffect} from 'react';
 import {unstable_batchedUpdates as batchedUpdates} from 'react-dom';
diff --git a/packages/react-devtools-shared/src/devtools/views/TabBar.js b/packages/react-devtools-shared/src/devtools/views/TabBar.js
index c05999ebabe95..7e6b9b9e9866f 100644
--- a/packages/react-devtools-shared/src/devtools/views/TabBar.js
+++ b/packages/react-devtools-shared/src/devtools/views/TabBar.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useCallback} from 'react';
 import Tooltip from '@reach/tooltip';
diff --git a/packages/react-devtools-shared/src/devtools/views/Toggle.js b/packages/react-devtools-shared/src/devtools/views/Toggle.js
index 99938273579c0..41b33dd70387a 100644
--- a/packages/react-devtools-shared/src/devtools/views/Toggle.js
+++ b/packages/react-devtools-shared/src/devtools/views/Toggle.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {useCallback} from 'react';
 import Tooltip from '@reach/tooltip';
diff --git a/packages/react-devtools-shared/src/devtools/views/WarnIfLegacyBackendDetected.js b/packages/react-devtools-shared/src/devtools/views/WarnIfLegacyBackendDetected.js
index 90a1bc3933055..cdcee4758ab92 100644
--- a/packages/react-devtools-shared/src/devtools/views/WarnIfLegacyBackendDetected.js
+++ b/packages/react-devtools-shared/src/devtools/views/WarnIfLegacyBackendDetected.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useContext, useEffect} from 'react';
 import {BridgeContext} from './context';
diff --git a/packages/react-devtools-shared/src/devtools/views/context.js b/packages/react-devtools-shared/src/devtools/views/context.js
index e0fce93ececa6..aa8fd3acf7234 100644
--- a/packages/react-devtools-shared/src/devtools/views/context.js
+++ b/packages/react-devtools-shared/src/devtools/views/context.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import {createContext} from 'react';
 import Store from '../store';
diff --git a/packages/react-devtools-shared/src/devtools/views/hooks.js b/packages/react-devtools-shared/src/devtools/views/hooks.js
index 550b0952cda25..b86fb93b0e01b 100644
--- a/packages/react-devtools-shared/src/devtools/views/hooks.js
+++ b/packages/react-devtools-shared/src/devtools/views/hooks.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import throttle from 'lodash.throttle';
 import {useCallback, useEffect, useLayoutEffect, useState} from 'react';
diff --git a/packages/react-devtools-shared/src/devtools/views/portaledContent.js b/packages/react-devtools-shared/src/devtools/views/portaledContent.js
index b3e59c48e484d..32cff8504af6e 100644
--- a/packages/react-devtools-shared/src/devtools/views/portaledContent.js
+++ b/packages/react-devtools-shared/src/devtools/views/portaledContent.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 import {createPortal} from 'react-dom';
diff --git a/packages/react-devtools-shared/src/devtools/views/utils.js b/packages/react-devtools-shared/src/devtools/views/utils.js
index 7e5a42c706a46..9ad71b5cd805a 100644
--- a/packages/react-devtools-shared/src/devtools/views/utils.js
+++ b/packages/react-devtools-shared/src/devtools/views/utils.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import escapeStringRegExp from 'escape-string-regexp';
 import {meta} from '../../hydration';
diff --git a/packages/react-devtools-shared/src/hydration.js b/packages/react-devtools-shared/src/hydration.js
index b118a1cb85815..6624041d0d345 100644
--- a/packages/react-devtools-shared/src/hydration.js
+++ b/packages/react-devtools-shared/src/hydration.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import Symbol from 'es6-symbol';
 import {
diff --git a/packages/react-devtools-shared/src/storage.js b/packages/react-devtools-shared/src/storage.js
index 888009c76e437..4451ef1d61092 100644
--- a/packages/react-devtools-shared/src/storage.js
+++ b/packages/react-devtools-shared/src/storage.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 export function localStorageGetItem(key: string): any {
   try {
diff --git a/packages/react-devtools-shared/src/types.js b/packages/react-devtools-shared/src/types.js
index a9999784920fa..16ac54989d19a 100644
--- a/packages/react-devtools-shared/src/types.js
+++ b/packages/react-devtools-shared/src/types.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 export type Wall = {|
   // `listen` returns the "unlisten" function.
diff --git a/packages/react-devtools-shared/src/utils.js b/packages/react-devtools-shared/src/utils.js
index 3781bc60cc35d..990ecf996896e 100644
--- a/packages/react-devtools-shared/src/utils.js
+++ b/packages/react-devtools-shared/src/utils.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import Symbol from 'es6-symbol';
 import LRU from 'lru-cache';
diff --git a/packages/react-devtools-shell/src/app/DeeplyNestedComponents/index.js b/packages/react-devtools-shell/src/app/DeeplyNestedComponents/index.js
index eaf22f4e48f16..bc6b05fa9d774 100644
--- a/packages/react-devtools-shell/src/app/DeeplyNestedComponents/index.js
+++ b/packages/react-devtools-shell/src/app/DeeplyNestedComponents/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment} from 'react';
 
diff --git a/packages/react-devtools-shell/src/app/EditableProps/index.js b/packages/react-devtools-shell/src/app/EditableProps/index.js
index 4144e1976641f..220a58c17be32 100644
--- a/packages/react-devtools-shell/src/app/EditableProps/index.js
+++ b/packages/react-devtools-shell/src/app/EditableProps/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   createContext,
diff --git a/packages/react-devtools-shell/src/app/ElementTypes/index.js b/packages/react-devtools-shell/src/app/ElementTypes/index.js
index 56b7aa7e24ba6..b66d9eb9989fe 100644
--- a/packages/react-devtools-shell/src/app/ElementTypes/index.js
+++ b/packages/react-devtools-shell/src/app/ElementTypes/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   createContext,
diff --git a/packages/react-devtools-shell/src/app/Hydration/index.js b/packages/react-devtools-shell/src/app/Hydration/index.js
index 8fd2f31a1376c..914bf54ccc071 100644
--- a/packages/react-devtools-shell/src/app/Hydration/index.js
+++ b/packages/react-devtools-shell/src/app/Hydration/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useDebugValue, useState} from 'react';
 
diff --git a/packages/react-devtools-shell/src/app/InspectableElements/Contexts.js b/packages/react-devtools-shell/src/app/InspectableElements/Contexts.js
index 08c380dc0c2d0..776e043feca2d 100644
--- a/packages/react-devtools-shell/src/app/InspectableElements/Contexts.js
+++ b/packages/react-devtools-shell/src/app/InspectableElements/Contexts.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {createContext, Component, Fragment, useContext} from 'react';
 import PropTypes from 'prop-types';
diff --git a/packages/react-devtools-shell/src/app/InspectableElements/CustomHooks.js b/packages/react-devtools-shell/src/app/InspectableElements/CustomHooks.js
index 789787e1d74be..e363c35d58bcf 100644
--- a/packages/react-devtools-shell/src/app/InspectableElements/CustomHooks.js
+++ b/packages/react-devtools-shell/src/app/InspectableElements/CustomHooks.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {
   forwardRef,
diff --git a/packages/react-devtools-shell/src/app/InspectableElements/CustomObject.js b/packages/react-devtools-shell/src/app/InspectableElements/CustomObject.js
index f7cb376bf23c7..be8e53b5e78f9 100644
--- a/packages/react-devtools-shell/src/app/InspectableElements/CustomObject.js
+++ b/packages/react-devtools-shell/src/app/InspectableElements/CustomObject.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 
diff --git a/packages/react-devtools-shell/src/app/InspectableElements/InspectableElements.js b/packages/react-devtools-shell/src/app/InspectableElements/InspectableElements.js
index 142dcf2801c61..58cc8386f0452 100644
--- a/packages/react-devtools-shell/src/app/InspectableElements/InspectableElements.js
+++ b/packages/react-devtools-shell/src/app/InspectableElements/InspectableElements.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment} from 'react';
 import UnserializableProps from './UnserializableProps';
diff --git a/packages/react-devtools-shell/src/app/InspectableElements/NestedProps.js b/packages/react-devtools-shell/src/app/InspectableElements/NestedProps.js
index 5d51409246ee5..24076e85951d2 100644
--- a/packages/react-devtools-shell/src/app/InspectableElements/NestedProps.js
+++ b/packages/react-devtools-shell/src/app/InspectableElements/NestedProps.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 
diff --git a/packages/react-devtools-shell/src/app/InspectableElements/SimpleValues.js b/packages/react-devtools-shell/src/app/InspectableElements/SimpleValues.js
index 43373d6095e70..8b731b2e82b0c 100644
--- a/packages/react-devtools-shell/src/app/InspectableElements/SimpleValues.js
+++ b/packages/react-devtools-shell/src/app/InspectableElements/SimpleValues.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 
diff --git a/packages/react-devtools-shell/src/app/InspectableElements/UnserializableProps.js b/packages/react-devtools-shell/src/app/InspectableElements/UnserializableProps.js
index 0362c52b94a5f..cd6ecc9d1c230 100644
--- a/packages/react-devtools-shell/src/app/InspectableElements/UnserializableProps.js
+++ b/packages/react-devtools-shell/src/app/InspectableElements/UnserializableProps.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React from 'react';
 import Immutable from 'immutable';
diff --git a/packages/react-devtools-shell/src/app/InspectableElements/index.js b/packages/react-devtools-shell/src/app/InspectableElements/index.js
index 58efb1216ec8b..be617ddcf71b1 100644
--- a/packages/react-devtools-shell/src/app/InspectableElements/index.js
+++ b/packages/react-devtools-shell/src/app/InspectableElements/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import InspectableElements from './InspectableElements';
 
diff --git a/packages/react-devtools-shell/src/app/InteractionTracing/index.js b/packages/react-devtools-shell/src/app/InteractionTracing/index.js
index 769ea9e01f74a..be44460bb56df 100644
--- a/packages/react-devtools-shell/src/app/InteractionTracing/index.js
+++ b/packages/react-devtools-shell/src/app/InteractionTracing/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useCallback, useEffect, useState} from 'react';
 import {unstable_batchedUpdates as batchedUpdates} from 'react-dom';
diff --git a/packages/react-devtools-shell/src/app/PriorityLevels/index.js b/packages/react-devtools-shell/src/app/PriorityLevels/index.js
index db0d086e4d2b9..c19e02868f9b5 100644
--- a/packages/react-devtools-shell/src/app/PriorityLevels/index.js
+++ b/packages/react-devtools-shell/src/app/PriorityLevels/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useCallback, useState} from 'react';
 import {
diff --git a/packages/react-devtools-shell/src/app/ReactNativeWeb/index.js b/packages/react-devtools-shell/src/app/ReactNativeWeb/index.js
index 0cdd3f361a1c2..9f8246458e7b9 100644
--- a/packages/react-devtools-shell/src/app/ReactNativeWeb/index.js
+++ b/packages/react-devtools-shell/src/app/ReactNativeWeb/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useState} from 'react';
 import {Button, Text, View} from 'react-native-web';
diff --git a/packages/react-devtools-shell/src/app/SuspenseTree/index.js b/packages/react-devtools-shell/src/app/SuspenseTree/index.js
index 7fedd9ff4bc1f..a19442de5c812 100644
--- a/packages/react-devtools-shell/src/app/SuspenseTree/index.js
+++ b/packages/react-devtools-shell/src/app/SuspenseTree/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, Suspense, useState} from 'react';
 
diff --git a/packages/react-devtools-shell/src/app/ToDoList/List.js b/packages/react-devtools-shell/src/app/ToDoList/List.js
index 6752cd341cd92..1decfb28e7255 100644
--- a/packages/react-devtools-shell/src/app/ToDoList/List.js
+++ b/packages/react-devtools-shell/src/app/ToDoList/List.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {Fragment, useCallback, useState} from 'react';
 import ListItem from './ListItem';
diff --git a/packages/react-devtools-shell/src/app/ToDoList/ListItem.js b/packages/react-devtools-shell/src/app/ToDoList/ListItem.js
index 5d8d4336053a1..6d0a759169cdb 100644
--- a/packages/react-devtools-shell/src/app/ToDoList/ListItem.js
+++ b/packages/react-devtools-shell/src/app/ToDoList/ListItem.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import React, {memo, useCallback} from 'react';
 import styles from './ListItem.css';
diff --git a/packages/react-devtools-shell/src/app/ToDoList/index.js b/packages/react-devtools-shell/src/app/ToDoList/index.js
index 0a86ff185c6f2..bde76f4f1426c 100644
--- a/packages/react-devtools-shell/src/app/ToDoList/index.js
+++ b/packages/react-devtools-shell/src/app/ToDoList/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 import List from './List';
 
diff --git a/packages/react-devtools-shell/src/app/console.js b/packages/react-devtools-shell/src/app/console.js
index 947a0b4039f10..e41daa76d4269 100644
--- a/packages/react-devtools-shell/src/app/console.js
+++ b/packages/react-devtools-shell/src/app/console.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 function ignoreStrings(
   methodName: string,
diff --git a/packages/react-devtools/app.js b/packages/react-devtools/app.js
index b50ef179dd016..38304b4ffadda 100644
--- a/packages/react-devtools/app.js
+++ b/packages/react-devtools/app.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 const {app, BrowserWindow} = require('electron'); // Module to create native browser window.
 const {join} = require('path');
diff --git a/packages/react-devtools/bin.js b/packages/react-devtools/bin.js
index b36c0714b7d58..99780a2d9a4c9 100755
--- a/packages/react-devtools/bin.js
+++ b/packages/react-devtools/bin.js
@@ -1,6 +1,13 @@
 #!/usr/bin/env node
 
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 const electron = require('electron');
 const spawn = require('cross-spawn');
diff --git a/packages/react-devtools/index.js b/packages/react-devtools/index.js
index e01fbb8a0895c..a8730f5ae0697 100644
--- a/packages/react-devtools/index.js
+++ b/packages/react-devtools/index.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 const {connectToDevTools} = require('react-devtools-core/backend');
 
diff --git a/scripts/flow/react-devtools.js b/scripts/flow/react-devtools.js
index 39c92470f476d..fdc67a621eda4 100644
--- a/scripts/flow/react-devtools.js
+++ b/scripts/flow/react-devtools.js
@@ -1,4 +1,11 @@
-// @flow
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
 declare module 'events' {
   declare class EventEmitter<Events: Object> {