[linuxandrew]

As a long-time Firefox user (or rather, LibreWolf and Mull now) the biggest problem as I see it is websites that no longer support it. Compatibility is constantly getting worse as Chrome/Blink monopolises web dev and testing.

I'm considering writing letters to some of the sites that have the biggest issues and raising it as an issue.

Otherwise, Firefox is mostly fine. I have a few gripes with it and Moz are mismanaging their projects, but desktop Linux is hardly their #1 issue.

[Vinnl]

It's also helpful to report them at https://webcompat.com. Browsers can (and do) add site-specific workarounds every now and then, and/or reach out to the websites in question.