webpack.config.js

const path = require('path');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ZipPlugin = require('zip-webpack-plugin');

module.exports = {
  entry: {
    content: './src/scripts/content.js'
  },
  output: {
    filename: '[name].bundle.js',
    path: path.resolve(__dirname, 'dist'),
  },
  resolve: {
    extensions: ['.js'],
    fallback: {
      "buffer": require.resolve("buffer"),
      "stream": require.resolve("stream-browserify")
    }
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
      },
    ],
  },
  devtool: 'source-map',
  devServer: {
    static: {
      directory: path.join(__dirname, 'dist'),
    },
    compress: true,
    port: 9000,
    hot: true,
    devMiddleware: {
      writeToDisk: true,
    },
  },
  plugins: [
    new CleanWebpackPlugin(),
    new CopyWebpackPlugin({
      patterns: [
        { from: path.resolve(__dirname, 'manifest.json'), to: 'manifest.json' },
        { from: path.resolve(__dirname, 'icons'), to: 'icons' },
        { from: path.resolve(__dirname, '_locales'), to: '_locales' }
      ],
    }),
    new ZipPlugin({
      path: path.resolve(__dirname, 'artifacts'),
      filename: 'firefox-extension.zip',
    })
  ],
};