I always mute my tabs when I need to listen to something ingame, on other tabs, etc. It would be awesome if we could have a shortcut to mute and unmute tabs when I go back to them like Shift+M, CTRL+Shift+M or something along these lines.

Is there a way to move everything from Opera to Opera GX? I mean moving all my extensions, all my bookmarks, Speeddial and etc.