diff --git a/webpack.config.js b/webpack.config.js
new file mode 100644
index 0000000..bdc3ab9
--- /dev/null
+++ b/webpack.config.js
@@ -0,0 +1,84 @@
+const path = require('path');
+const json5 = require('json5');
+const CopyWebpackPlugin = require('copy-webpack-plugin');
+const WebpackShellPluginNext = require('webpack-shell-plugin-next');
+
+module.exports = (env, args) => {
+  // NOTE: When adding an entry, add the corresponding source map file to
+  // web_accessible_resources in //templates/manifest.gjson.
+  let entry = {
+    background: './src/background.js',
+    options: './src/options/options.js',
+  };
+
+  let outputPath = path.join(__dirname, 'dist', env.browser_target);
+
+  let preprocessorLoader = {
+    loader: 'webpack-preprocessor-loader',
+    options: {
+      params: {
+        browser_target: env.browser_target,
+        production: args.mode == 'production',
+      },
+    },
+  };
+
+  return {
+    entry,
+    output: {
+      filename: '[name].bundle.js',
+      path: outputPath,
+      clean: true,
+    },
+    plugins: [
+      new WebpackShellPluginNext({
+        onBuildEnd: {
+          scripts:
+              ['genmanifest -template templates/manifest.gjson -dest ' +
+               path.join(outputPath, 'manifest.json') + ' ' +
+               env.browser_target]
+        }
+      }),
+      new CopyWebpackPlugin({
+        patterns: [
+          {
+            from: path.join(__dirname, 'src/icons'),
+            to: path.join(outputPath, 'icons'),
+          },
+        ]
+      }),
+      new CopyWebpackPlugin({
+        patterns: [
+          {
+            from: path.join(__dirname, 'src/static'),
+            to: outputPath,
+            globOptions: {
+              ignore: ['**/OWNERS', '**.md'],
+            }
+          },
+        ]
+      }),
+    ],
+    devtool: (args.mode == 'production' ? 'source-map' : 'inline-source-map'),
+    module: {
+      rules: [
+        {
+          test: /\.json5$/i,
+          type: 'json',
+          parser: {
+            parse: json5.parse,
+          },
+          use: [
+            preprocessorLoader,
+          ],
+        },
+        {
+          test: /\.js$/i,
+          use: [
+            preprocessorLoader,
+          ],
+        },
+      ]
+    },
+  };
+};