Re: Ok, so you have fixed some bugs
Firefox - Has been trying to alienate all of its aficionados for the past 5 years
I was halfway switched to Chromum when Firefox 57 came out.
Ui changes - didn't bother me, I was using vimperator and the like for most of that debacle.
plugin/extension changes - don't use many
Really, really slow to start and heavy on resources was what was pushing me off though.