diff --git a/build.ts b/build.ts
index dad0706..4bdcbf7 100644
--- a/build.ts
+++ b/build.ts
@@ -1,12 +1,32 @@
 /* eslint-env node */
 
 import esbuild from 'esbuild';
+import packageJson from './package.json';
 
 const isProduction = process.env.NODE_ENV === 'production';
 
+// TODO configure auto-update
+// @updateURL    https://raw.githubusercontent.com/yourusername/yourrepository/main/youruserscript.user.js
+// @downloadURL  https://raw.githubusercontent.com/yourusername/yourrepository/main/youruserscript.user.js
+
+const banner = `
+// ==UserScript==
+// @name         ${packageJson.name}
+// @version      ${packageJson.version}
+// @description  ${packageJson.description}
+// @author       ${packageJson.author}
+// @match        *
+// @grant        GM_registerMenuCommand
+// ==/UserScript==
+`;
+
 await esbuild.build({
   entryPoints: ['./src/index.ts'],
-  outfile: './dist/index.js',
+  outfile: './dist/scraper.user.js',
+
+  banner: {
+    js: banner,
+  },
 
   target: ['es2019'],
   bundle: true,
diff --git a/package.json b/package.json
index 53ac21a..a7aefad 100644
--- a/package.json
+++ b/package.json
@@ -11,8 +11,7 @@
     "lint": "eslint --cache --ext .ts src/",
     "fmt": "prettier --write src/",
     "check-fmt": "prettier --check src/",
-    "test": "",
-    "prepare": "npm run build"
+    "test": ""
   },
   "author": "mbme",
   "license": "GPL-3.0-or-later",
diff --git a/src/index.ts b/src/index.ts
index 1e50dd2..d9ae942 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,8 +3,17 @@ import { BrowserScraper } from './browser-scraper';
 declare global {
   interface Window {
     _scraper: BrowserScraper;
+    GM_registerMenuCommand?: (menuItem: string, cb: () => void) => void;
   }
 }
 
-window._scraper = new BrowserScraper();
-window._scraper.injectScraperUI();
+function initScraper() {
+  window._scraper = new BrowserScraper();
+  window._scraper.injectScraperUI();
+}
+
+if (window.GM_registerMenuCommand) {
+  window.GM_registerMenuCommand('Run scraper', initScraper);
+} else {
+  initScraper();
+}
diff --git a/src/test-utils.ts b/src/test-utils.ts
index 3b5208a..0874f3b 100644
--- a/src/test-utils.ts
+++ b/src/test-utils.ts
@@ -11,7 +11,10 @@ const DEBUG = process.env.DEBUG === 'true';
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 
-export const scraperScript = await fs.readFile(path.join(__dirname, '../dist/index.js'), 'utf-8');
+export const scraperScript = await fs.readFile(
+  path.join(__dirname, '../dist/scraper.user.js'),
+  'utf-8',
+);
 
 let browser: Browser | undefined;
 let context: BrowserContext | undefined;