diff --git a/packages/react-devtools-extensions/chrome/manifest.json b/packages/react-devtools-extensions/chrome/manifest.json
index c1e7cf3c0c120..8924a9d95cb6d 100644
--- a/packages/react-devtools-extensions/chrome/manifest.json
+++ b/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": {
diff --git a/packages/react-devtools-extensions/edge/manifest.json b/packages/react-devtools-extensions/edge/manifest.json
index 9c168a430e5bc..bdd387ff7aabb 100644
--- a/packages/react-devtools-extensions/edge/manifest.json
+++ b/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": {
diff --git a/packages/react-devtools-extensions/firefox/manifest.json b/packages/react-devtools-extensions/firefox/manifest.json
index d8c79b1aa6470..6a46cd88fb84f 100644
--- a/packages/react-devtools-extensions/firefox/manifest.json
+++ b/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": {
diff --git a/packages/react-devtools-extensions/webpack.backend.js b/packages/react-devtools-extensions/webpack.backend.js
index c9f1c336b0268..2399c10892e35 100644
--- a/packages/react-devtools-extensions/webpack.backend.js
+++ b/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',
   },
diff --git a/packages/react-devtools-extensions/webpack.config.js b/packages/react-devtools-extensions/webpack.config.js
index 1a406ccdaf907..4d6d00c52ac11 100644
--- a/packages/react-devtools-extensions/webpack.config.js
+++ b/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',