Fix error loading source maps for devtools extension (#20079)

Author: sytranvn

packages/react-devtools-extensions/chrome/manifest.json

@@ -32,14 +32,7 @@
     "main.html",
     "panel.html",
     "build/react_devtools_backend.js",
-    "build/renderer.js",
-    "build/background.js.map",
-    "build/contentScript.js.map",
-    "build/injectGlobalHook.js.map",
-    "build/main.js.map",
-    "build/panel.js.map",
-    "build/renderer.js.map",
-    "build/react_devtools_backend.js.map"
+    "build/renderer.js"
   ],
 
   "background": {

packages/react-devtools-extensions/edge/manifest.json

@@ -32,14 +32,7 @@
     "main.html",
     "panel.html",
     "build/react_devtools_backend.js",
-    "build/renderer.js",
-    "build/background.js.map",
-    "build/contentScript.js.map",
-    "build/injectGlobalHook.js.map",
-    "build/main.js.map",
-    "build/panel.js.map",
-    "build/renderer.js.map",
-    "build/react_devtools_backend.js.map"
+    "build/renderer.js"
   ],
 
   "background": {

packages/react-devtools-extensions/firefox/manifest.json

@@ -37,14 +37,7 @@
     "main.html",
     "panel.html",
     "build/react_devtools_backend.js",
-    "build/renderer.js",
-    "build/background.js.map",
-    "build/contentScript.js.map",
-    "build/injectGlobalHook.js.map",
-    "build/main.js.map",
-    "build/panel.js.map",
-    "build/renderer.js.map",
-    "build/react_devtools_backend.js.map"
+    "build/renderer.js"
   ],
 
   "background": {

packages/react-devtools-extensions/webpack.backend.js

@@ -18,7 +18,7 @@ const DEVTOOLS_VERSION = getVersionString();
 
 module.exports = {
   mode: __DEV__ ? 'development' : 'production',
-  devtool: __DEV__ ? 'cheap-module-eval-source-map' : 'source-map',
+  devtool: __DEV__ ? 'cheap-module-eval-source-map' : false,
   entry: {
     backend: './src/backend.js',
   },

packages/react-devtools-extensions/webpack.config.js

@@ -19,7 +19,7 @@ const DEVTOOLS_VERSION = getVersionString();
 
 module.exports = {
   mode: __DEV__ ? 'development' : 'production',
-  devtool: __DEV__ ? 'cheap-module-eval-source-map' : 'source-map',
+  devtool: __DEV__ ? 'cheap-module-eval-source-map' : false,
   entry: {
     background: './src/background.js',
     contentScript: './src/contentScript.js',