Chromium fork named after radioactive element No. 90. Windows and MacOS/Raspi/Android/Special builds are in different repositories, links are towards the top of the README.md.
Problem
The unmute/mute functionality seems inconsistent with pinned tabs. If you have music playing in a pinned tab and you navigate away from it, clicking to mute the pinned tab works but then it seems to enter a state where it cannot be unmuted. Right clicking and opening the context menu shows it as still unmuted ("mute site" is displayed), selecting "mute" entry changes the context menu between "mute site" and "unmute site" but the site stays muted. The only way to resolve it seems to be to unpin, unmute, then repin.
System Details
Problem The unmute/mute functionality seems inconsistent with pinned tabs. If you have music playing in a pinned tab and you navigate away from it, clicking to mute the pinned tab works but then it seems to enter a state where it cannot be unmuted. Right clicking and opening the context menu shows it as still unmuted ("mute site" is displayed), selecting "mute" entry changes the context menu between "mute site" and "unmute site" but the site stays muted. The only way to resolve it seems to be to unpin, unmute, then repin.