The lack of HVEC/h.265 support is kind of a deal breaker in firefox (windows nightly builds don't count as done). I need it to view h.265 security cameras and the occasional movie streamed via browser.
Edit: For those suggesting multiple browsers I could just use Edge if I wanted to.. still better compatibility as it is essentially chromium.
I have a list of other things that don’t work reliably in Firefox such as various video conferencing tools so no, I am not going to switch to Firefox as my primary browser again anytime soon.
I was a Firefox user for many years but there are too many daily things I use now that prevent me from using it as a primary browser for work and causal use.