Prepare AMO source submission

.gitignore

@@ -1,7 +1,6 @@
 *cert
 *Backend
 .DS_Store
-package-lock.json
 
 # Website node modules and build output
 Website/package-lock.json
@@ -40,5 +39,4 @@ Extensions/combined/bundled-content-script.js
 
 # Dist Files
 Extensions/combined/dist/*
-package-lock.json
 Website/package-lock.json

.nvmrc

@@ -1 +1 @@
-v12.18.4
+v22.17.0

README_AMO_SOURCE.md

@@ -0,0 +1,66 @@
+# AMO Source Build Instructions
+
+This source package is provided for Mozilla Add-ons review. The extension is built with webpack, so reviewers should rebuild the submitted source and compare the generated Firefox output with the uploaded add-on package.
+
+## Build environment
+
+The release was built with:
+
+- Ubuntu 24.04-compatible environment
+- Node.js 22.17.0
+- npm 10.8.2
+
+The build script is cross-platform and also works on Windows and macOS when the same Node.js and npm versions are installed.
+
+## Install Node.js
+
+Using `nvm`:
+
+```sh
+nvm install 22.17.0
+nvm use 22.17.0
+```
+
+Confirm the versions:
+
+```sh
+node --version
+npm --version
+```
+
+Expected versions:
+
+```text
+v22.17.0
+10.8.2
+```
+
+## Build
+
+From the repository root, run:
+
+```sh
+node scripts/build-firefox-source.mjs
+```
+
+The script performs all required technical build steps:
+
+1. Installs dependencies with `npm ci`.
+2. Builds the extension with `npm run build`.
+3. Verifies the generated Firefox output exists.
+4. Verifies `ryd.content-script.js` is below 5 MB and does not contain a source map reference.
+
+The generated Firefox extension files are written to:
+
+```text
+Extensions/combined/dist/firefox
+```
+
+Use that directory when comparing the rebuilt code with the submitted Firefox add-on package.
+
+## Notes
+
+- `package-lock.json` is included so npm installs the same dependency versions used for this release.
+- Production builds disable inline source maps. Development builds still use inline source maps through `npm run dev`.
+- The production bundle is generated by webpack but is not intentionally obfuscated or minified.
+- `node_modules` and `Extensions/combined/dist` are generated locally and are not source inputs.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "return-youtube-dislike",
-  "version": "4.0.2",
+  "version": "4.0.3",
   "description": "Chrome extension to return youtube dislikes",
   "main": "ryd.content-script.js",
   "scripts": {

scripts/build-firefox-source.mjs

@@ -0,0 +1,87 @@
+import { spawnSync } from "node:child_process";
+import { existsSync, readFileSync, statSync } from "node:fs";
+import { dirname, join, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const scriptDirectory = dirname(fileURLToPath(import.meta.url));
+const repositoryRoot = resolve(scriptDirectory, "..");
+const firefoxOutputDirectory = join(repositoryRoot, "Extensions", "combined", "dist", "firefox");
+const firefoxManifestPath = join(firefoxOutputDirectory, "manifest.json");
+const contentScriptPath = join(firefoxOutputDirectory, "ryd.content-script.js");
+const maxContentScriptBytes = 5 * 1024 * 1024;
+const npmCommand = process.platform === "win32" ? "npm.cmd" : "npm";
+const shouldUseShell = process.platform === "win32";
+
+function run(command, args, options = {}) {
+  const result = spawnSync(command, args, {
+    cwd: repositoryRoot,
+    env: {
+      ...process.env,
+      ...options.env,
+    },
+    stdio: "inherit",
+    shell: shouldUseShell,
+  });
+
+  if (result.error !== undefined) {
+    throw result.error;
+  }
+
+  if (result.status !== 0) {
+    throw new Error(`${command} ${args.join(" ")} failed with exit code ${result.status}`);
+  }
+}
+
+function readCommandOutput(command, args) {
+  const result = spawnSync(command, args, {
+    cwd: repositoryRoot,
+    encoding: "utf8",
+    shell: shouldUseShell,
+  });
+
+  if (result.error !== undefined) {
+    throw result.error;
+  }
+
+  if (result.status !== 0) {
+    throw new Error(`${command} ${args.join(" ")} failed with exit code ${result.status}`);
+  }
+
+  return result.stdout.trim();
+}
+
+function verifyFileExists(filePath, description) {
+  if (!existsSync(filePath)) {
+    throw new Error(`${description} was not generated at ${filePath}`);
+  }
+}
+
+console.log(`Node.js: ${process.version}`);
+console.log(`npm: ${readCommandOutput(npmCommand, ["--version"])}`);
+
+console.log("Installing dependencies...");
+run(npmCommand, ["ci"], {
+  env: {
+    HUSKY: "0",
+  },
+});
+
+console.log("Building Firefox extension output...");
+run(npmCommand, ["run", "build"]);
+
+verifyFileExists(firefoxManifestPath, "Firefox manifest");
+verifyFileExists(contentScriptPath, "Firefox content script");
+
+const contentScriptSize = statSync(contentScriptPath).size;
+if (contentScriptSize >= maxContentScriptBytes) {
+  throw new Error(`ryd.content-script.js is ${contentScriptSize} bytes, expected less than ${maxContentScriptBytes}`);
+}
+
+const contentScript = readFileSync(contentScriptPath, "utf8");
+if (contentScript.includes("sourceMappingURL")) {
+  throw new Error("ryd.content-script.js contains a source map reference");
+}
+
+console.log(`Firefox output: ${firefoxOutputDirectory}`);
+console.log(`ryd.content-script.js: ${contentScriptSize} bytes`);
+console.log("AMO source build completed successfully.");

webpack.config.js

@@ -66,7 +66,7 @@ class MirrorJsOutputsPlugin {
   }
 }
 
-module.exports = {
+module.exports = (env, argv) => ({
   entry: Object.fromEntries(
     entries.map((entry) => [entry, path.join(__dirname, "./Extensions/combined/", `${entry}.js`)]),
   ),
@@ -132,5 +132,5 @@ module.exports = {
   experiments: {
     topLevelAwait: true,
   },
-  devtool: "inline-source-map",
-};
+  devtool: argv.mode === "development" ? "inline-source-map" : false,
+});