diff --git a/rollup.config.js b/rollup.config.js
index 231ec46..c033097 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -83,7 +83,7 @@ export default [
             format: "iife",
             sourcemap: false,
             banner: getBannerText,
-            intro: "new Promise(resolve=>{const id=''+Math.random();(typeof unsafeWindow=='object'?unsafeWindow:window)[id]=resolve;setTimeout(`(function a(){window['${id}'](new Image())})()//# sourceURL=${location.href}`)}).then(d=>{d.style.display='none';d.src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==';d.once=false;d.setAttribute('onload','if(this.once)return;this.once=true;this.remove();(' + function a () {",
+            intro: "const w=typeof unsafeWindow=='object'?unsafeWindow:window;const gmId=''+Math.random();w[gmId]=typeof GM=='object'?GM:undefined;new Promise(resolve=>{const id=''+Math.random();w[id]=resolve;setTimeout(`(function a(){window['${id}'](new Image())})()//# sourceURL=${location.href}`)}).then(d=>{d.style.display='none';d.src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==';d.once=false;d.setAttribute('onload',`if(this.once)return;this.once=true;this.remove();const GM=window['${gmId}'];(` + function a () {",
             outro: "}.toString() + ')()');document.body.prepend(d)})"
         },
         plugins,
diff --git a/src/btn.ts b/src/btn.ts
index b7c6e6a..0bd6dc9 100644
--- a/src/btn.ts
+++ b/src/btn.ts
@@ -2,6 +2,7 @@
 import { ScoreInfo } from './scoreinfo'
 import { loadMscore, WebMscore } from './mscore'
 import { useTimeout, windowOpenAsync, console, attachShadow } from './utils'
+import { isGmAvailable, registerMenuCommand } from './gm'
 import i18n from './i18n'
 // @ts-ignore
 import btnListCss from './btn.css'
@@ -86,6 +87,13 @@ export class BtnList {
       btnTpl.title = options.tooltip
     }
 
+    // add buttons to the userscript manager menu
+    if (isGmAvailable()) {
+      registerMenuCommand(options.name, () => {
+        options.action(options.name, btnTpl, () => undefined)
+      })
+    }
+
     return btnTpl
   }
 
diff --git a/src/gm.ts b/src/gm.ts
new file mode 100644
index 0000000..e02e1c0
--- /dev/null
+++ b/src/gm.ts
@@ -0,0 +1,19 @@
+
+/**
+ * UserScript APIs
+ */
+declare const GM: {
+  /** https://www.tampermonkey.net/documentation.php#GM_registerMenuCommand */
+  registerMenuCommand (name: string, fn: () => any, accessKey?: string): Promise<number>;
+}
+
+type GM = typeof GM
+
+export const isGmAvailable = (): boolean => {
+  return typeof GM !== 'undefined' &&
+    typeof GM.registerMenuCommand === 'function'
+}
+
+export const registerMenuCommand: GM['registerMenuCommand'] = (...args) => {
+  return GM.registerMenuCommand(...args)
+}
diff --git a/src/meta.js b/src/meta.js
index 7bd0120..21c6464 100644
--- a/src/meta.js
+++ b/src/meta.js
@@ -13,5 +13,6 @@
 // @license      MIT
 // @copyright    Copyright (c) 2019-2020 Xmader
 // @grant        unsafeWindow
+// @grant        GM.registerMenuCommand
 // @run-at       document-start
 // ==/UserScript==