Unable to get GM_notification function to work in Tampermonkey userscript (chrome, OSX)

Question

I'm trying to re-write some of my Tampermonkey scripts to use some of the built in TM/GM functions, but I can't get them to work. An example is the GM_Notification function.

I'm testing it out using the example GM_notification from the documentation. Here is the complete userscript file contents:

// ==UserScript==
// @name   Test Notification
// @namespace http://tampermonkey.net/
// @version   2024-01-06
// @description  try to take over the world!
// @author    You
// @match  https://gist.github.com/EtienneDG/fe32d3213d87f79e0da0f829e73ee4ab
// @icon   https://www.google.com/s2/favicons?sz=64&domain=github.com
// @grant  GM_notification
// @grant  GM.notification
// @grant unsafeWindow
// @sandbox JavaScript
// ==/UserScript==

(function() {
  'use strict'

  console.log('Loaded test notification')

  console.log('About to execute GM_notification...');

  GM_notification({
    text: "This is the notification message.",
    title: "Notification Title",
    url: 'https:/google.com/',
    onclick: (event) => {
      // The userscript is still running, so don't open example.com
      event.preventDefault();
      // Display an alert message instead
      alert('I was clicked!')
    },
  });

  console.log('Executed GM_notification')
})()

And when I go to the page that loads this script, I get absolutely no notification/alert, or even an error. The console output is below:

content: normal start event processing for lr2kbof7.baa (1 to run)
VM3242 content.js:55 env: schedule "Test Notification" for document-idle
VM3242 content.js:53 env: inject "Test Notification" now
VM3242 content.js:73 content: DOMContentLoaded
VM3242 content.js:54 env: run "Test Notification" now  (0 requires)
userscript.html?name=Test-Notification.user.js&id=a8f4d506-9af0-45b8-8eed-362488ac963e:21 Loaded test notification
userscript.html?name=Test-Notification.user.js&id=a8f4d506-9af0-45b8-8eed-362488ac963e:23 About to execute GM_notification...
userscript.html?name=Test-Notification.user.js&id=a8f4d506-9af0-45b8-8eed-362488ac963e:37 Executed GM_notification
VM3242 content.js:73 content: load

So the script clearly runs, but I don't see any notification or any error in the console logs.

I have tried using the async GM.notification as well:

// ==UserScript==
// @name   Test Notification
// @namespace http://tampermonkey.net/
// @version   2024-01-06
// @description  try to take over the world!
// @author    You
// @match  https://gist.github.com/EtienneDG/fe32d3213d87f79e0da0f829e73ee4ab
// @icon   https://www.google.com/s2/favicons?sz=64&domain=github.com
// @grant  GM_notification
// @grant  GM.notification
// @grant unsafeWindow
// @sandbox JavaScript
// ==/UserScript==

(async function() {
  'use strict'

  console.log('Loaded test notification')

  console.log('About to execute await GM.notification...');

  const clicked = await GM.notification({ text: "Click me." });
  console.log('clicked:',clicked)

  console.log('Executed await GM.notification')
})()

But it was the same thing (no notification or errors)

I have tried a few things while debugging:

1. Trying with the other @sandbox values: MAIN_WORLD, ISOLATED_WORLD, USERSCRIPT_WORLD, raw, DOM
2. Does't seem to be any permissions issues with the TM plugin or script
3. The Add GM functions to this or window is set to On in the script settings
4. Set Run At to: document-start, document-body, document-end
5. For the Position setting, I tried 1, 3 and 7
6. Consulted the Google Gods, and found some similar threads (Example: Uncaught ReferenceError: GM_notification is not defined), but ultimately I haven't found anything that fixes it.

Local Specs:

• OS: macOS Big Sur
• Browser: Chrome Version 120.0.6099.129 (Official Build) (x86_64)
• Tampermonkey Version: v5.0.0

Any help would be appreciated. Thank you.

Answer 1

I found the answer (thanks to this).

It wasn't the extension settings or security settings within Chrome, but the system security systems for Chrome. I went to my System Preferences > Notifications > Looked for Chrome and noticed it was disabled:

Once enabled, the notifications worked just fine.

Thanks!