diff --git a/packages/react-devtools-extensions/webpack.backend.js b/packages/react-devtools-extensions/webpack.backend.js
index 20dc0e3a9fd20..a8069184a4aaf 100644
--- a/packages/react-devtools-extensions/webpack.backend.js
+++ b/packages/react-devtools-extensions/webpack.backend.js
@@ -74,6 +74,9 @@ module.exports = {
       'process.env.IS_CHROME': IS_CHROME,
       'process.env.IS_FIREFOX': IS_FIREFOX,
       'process.env.IS_EDGE': IS_EDGE,
+      __IS_CHROME__: IS_CHROME,
+      __IS_FIREFOX__: IS_FIREFOX,
+      __IS_EDGE__: IS_EDGE,
     }),
     new Webpack.SourceMapDevToolPlugin({
       filename: '[file].map',