Adds a sleep timer on the bottom-left side of YouTube Music.

1. Install a Userscript manager for your web browser

   • Greasemonkey (Firefox)
   • Tampermonkey (Chrome, Firefox, Safari, Edge)

2. Download the latest build. If you have Greasemonkey or Tampermonkey installed, then you should immediately be prompted with a confirmation window asking you if you wish to install this Userscript.

1. Install prereqs

   • node
   • pnpm
   • Tampermonkey on Chrome

2. In Chrome:

   • Go to chrome://extensions/
   • Go into Tampermonkey's details
   • Enable Allow access to file URLs

3. Run dev server

   pnpm install
   pnpm dev
   

4. In Chrome:

   • Go to http://localhost:8080/userscript-youtube-music-sleep-timer.proxy.user.js and install the script