suggestion

[jonathan-annett]

when you switch to a currently playing tab, (presumably to mute or turn it up/down), it would be nice to have a short list of recenty visited tab (with or without audio) to allow the user to return to where they were. at the very least, save the previous tab, and have a button to go back there.

[JonasNo]

Perhaps this will satisfy your need:
https://chrome.google.com/webstore/detail/toggle-switch-recent-last/odhjcgnlbagjllfbilicalpigimhdcll?hl=en