webpack.config.js

const glob = require("glob");
const path = require("path");
const TerserPlugin = require('terser-webpack-plugin');

const AllFramesAtDocumentStart = glob.sync("./Client/Frontend/UserContent/UserScripts/AllFrames/AtDocumentStart/*.js");
const AllFramesAtDocumentStartSandboxed = glob.sync("./Client/Frontend/UserContent/UserScripts/Sandboxed/AllFrames/AtDocumentStart/*.js");
const AllFramesAtDocumentEnd = glob.sync("./Client/Frontend/UserContent/UserScripts/AllFrames/AtDocumentEnd/*.js");
const AllFramesAtDocumentEndSandboxed = glob.sync("./Client/Frontend/UserContent/UserScripts/Sandboxed/AllFrames/AtDocumentEnd/*.js");
const MainFrameAtDocumentStart = glob.sync("./Client/Frontend/UserContent/UserScripts/MainFrame/AtDocumentStart/*.js");
const MainFrameAtDocumentEnd = glob.sync("./Client/Frontend/UserContent/UserScripts/MainFrame/AtDocumentEnd/*.js");
const MainFrameAtDocumentStartSandboxed = glob.sync("./Client/Frontend/UserContent/UserScripts/Sandboxed/MainFrame/AtDocumentStart/*.js");
const MainFrameAtDocumentEndSandboxed = glob.sync("./Client/Frontend/UserContent/UserScripts/Sandboxed/MainFrame/AtDocumentEnd/*.js");

// Ensure the first script loaded at document start is __firefox__.js
// since it defines the `window.__firefox__` global.
if (path.basename(AllFramesAtDocumentStart[0]) !== "__firefox__.js") {
  throw "ERROR: __firefox__.js is expected to be the first script in AllFramesAtDocumentStart.js";
}

// Ensure the first script loaded at document end is __firefox__.js
// since it also defines the `window.__firefox__` global because PDF
// content does not execute user scripts designated to run at document
// start for some reason. ¯\_(ツ)_/¯
if (path.basename(AllFramesAtDocumentEnd[0]) !== "__firefox__.js") {
  throw "ERROR: __firefox__.js is expected to be the first script in AllFramesAtDocumentEnd.js";
}

if (path.basename(AllFramesAtDocumentStartSandboxed[0]) !== "__firefox__.js") {
  throw "ERROR: __firefox__.js is expected to be the first script in AllFramesAtDocumentStartSandboxed.js";
}

if (path.basename(AllFramesAtDocumentEndSandboxed[0]) !== "__firefox__.js") {
  throw "ERROR: __firefox__.js is expected to be the first script in AllFramesAtDocumentEndSandboxed.js";
}

module.exports = {
  mode: "production",
  entry: {
    AllFramesAtDocumentStart: AllFramesAtDocumentStart,
    AllFramesAtDocumentStartSandboxed: AllFramesAtDocumentStartSandboxed,
    AllFramesAtDocumentEnd: AllFramesAtDocumentEnd,
    AllFramesAtDocumentEndSandboxed: AllFramesAtDocumentEndSandboxed,
    MainFrameAtDocumentStart: MainFrameAtDocumentStart,
    MainFrameAtDocumentEnd: MainFrameAtDocumentEnd,
    MainFrameAtDocumentStartSandboxed: MainFrameAtDocumentStartSandboxed,
    MainFrameAtDocumentEndSandboxed: MainFrameAtDocumentEndSandboxed
  },
  // optimization: { minimize: false }, // use for debugging
  output: {
    filename: "[name].js",
    path: path.resolve(__dirname, "Client/Assets")
  },
  module: {
    rules: []
  },
  plugins: []
};