Great extension, but...

1. I noticed that it doesn't work on some websites due to Content-Security-Policy. I had to use a few tricks to make it work and I have a few ideas on how to solve this.

2. I added volume control in the options.

do you have a git repo?

i am sure you got it right.
2 issues but i know this can be pain when you develop a new app:
- think of writing down some GDPR compliances in your privacy policy.
it helps

-> IMPORTANT !!! ???
the addon remains
- removed from the toolbar, and
- not listed in the overflow menu for the addons

Check this out this is a major bug,
i use the last version of firefox.

Thank you!!