diff --git a/extension/webpack/base.config.js b/extension/webpack/base.config.js
index 3c17f491..1b70315f 100644
--- a/extension/webpack/base.config.js
+++ b/extension/webpack/base.config.js
@@ -33,10 +33,7 @@ const baseConfig = (params) => ({
     new webpack.DefinePlugin(params.globals),
     ...(params.plugins
       ? params.plugins
-      : [
-          new webpack.optimize.ModuleConcatenationPlugin(),
-          new webpack.optimize.OccurrenceOrderPlugin(),
-        ]),
+      : [new webpack.optimize.ModuleConcatenationPlugin()]),
   ].concat(
     params.copy
       ? new CopyPlugin({
diff --git a/packages/redux-devtools-app/webpack.config.umd.ts b/packages/redux-devtools-app/webpack.config.umd.ts
index fc92f02f..dc92eb4a 100644
--- a/packages/redux-devtools-app/webpack.config.umd.ts
+++ b/packages/redux-devtools-app/webpack.config.umd.ts
@@ -51,7 +51,6 @@ module.exports = (env: { production?: boolean } = {}) => ({
   plugins: [
     new webpack.DefinePlugin({
       'process.env': {
-        NODE_ENV: JSON.stringify('production'),
         PLATFORM: JSON.stringify('web'),
       },
     }),