This works by extending the Notification API functionality. It'll get a list of tones to play from the github repo and will player a random selected tone when there's a browser notification from Slack. Make sure to enable the audo play permissions in browser for Slack URL.

Install

• License: Mozilla Public License 2.0
• Weekly downloads: 0
• Average daily users: 1
• Rating: 0/5 of 0 ratings
• Created: 2020-02-08 10:41:28
• Last updated: 2020-02-08 14:10:12
• Homepage:
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/slack-rick/
• API: {40a8389b-db2e-4ebe-9e83-1b8fed59d905}