> many sites I use on a daily basis have almost unusable bugs on FF (I have to hack CSS because token auth popup from my bank is broken, a game related website

> many sites I use on a daily basis have almost unusable bugs on FF (I have to hack CSS because token auth popup from my bank is broken, a game related website has half of the scrolling on the page broken, in general so many sites have broken scrolling on FF) You can report sites that are broken in Firefox at https://webcompat.com/ https://webcompat.com/. Mozilla engineers will debug the broken site and try to contact the site's developers. Firefox also ships some site-specific workarounds (such as spoofing Chrome's User-Agent string or tweaking some CSS). You can see the current list of site workarounds in Firefox's about:compat page.