1050
Stop using Opera Browser and Opera GX
(www.spacebar.news)
This is a most excellent place for technology news and articles.
I also left Firefox for Chrome many years ago during that time period, but Firefox has been good again for quite some time. They did a big refresh called Quantum several years back and solved most of those issues. Give it a try.
They also solved the "issue" of XULRunner and all associated functionality, not offering anything instead.
I had to move from
conkeror
, and now jump between FF and SeaMonkey. The latter lags behind a bit in porting FF functionality.To each his own, I guess.