The upnacked zip worked just fine though!
Nice extension, thanks!
(Vivaldi 6.2.3096.3 on Linux)
Repeated clicking results in loop of 1) muting second to the last extension 2) muting the extension I'm actually clicking 3) unmuting second to the last and 4) unmuting the one I'm clicking :-D
It is quite hard to describe, I may create a video and upload it somewhere later.
I was clicking around for a bit and noticed one more thing: it does not display "Anti Anti Debug" extension - but that extension suddenly appears when I toggle any mute button.
Maybe that extension is doing something funny? It is too late for me to try now but I will keep digging around tomorrow.