Fix #2254, build production versions of bundles (#3432)

This always builds bundles as a production build. envify and uglifyify should also help improve overall bundle sizes

bin/build-scripts/bundle_dependencies

@@ -34,7 +34,9 @@ build() {
   echo -n "Building $(basename $dest): deps... "
   browserify --list -e "$@" | sed "s!$(pwd)/!!g" | grep -v build-time > "$(depfile)"
   echo -n "bundle... "
-  browserify -o "$dest" \
+  NODE_ENV=production browserify -o "$dest" \
+    -g [ envify --NODE_ENV production ] \
+    -g uglifyify \
     -e "$@"
   if [[ -z "$NO_UGLIFY" ]] ; then
     echo -n "minimizing... "

package.json

@@ -55,6 +55,7 @@
     "body-parser": "1.17.2",
     "browserify": "14.4.0",
     "david": "11.0.0",
+    "envify": "4.1.0",
     "eslint": "4.3.0",
     "eslint-plugin-mozilla": "0.4.2",
     "eslint-plugin-promise": "3.5.0",
@@ -70,6 +71,7 @@
     "sass-lint": "1.10.2",
     "selenium-webdriver": "3.5.0",
     "svgo": "0.7.2",
+    "uglifyify": "4.0.3",
     "uglify-js": "3.0.26",
     "web-ext": "1.10.1"
   },