I just switched back to chrome for the same reason. Every page in Firefox was taking 60+second to load. Tried it on chrome and pages were loading instantly. I had originally switched to Firefox for privacy concerns but that and the memory usage/occasional crashing were too much for me. edit: not sure what the downvotes are for. I'm glad there's a second option out there. It didn't work for me but figured it was worth…
I don’t have a dedicated browser, I use edge chrome safari and Firefox interchangeably. However, I work on websites for a living. Using different browsers is part of the job and if I don’t I might miss something breaking somewhere.
Generally my thinking has been get passwords into 1P, store bookmarks and interesting sites in zotero. Now, all I use the browsers for its pure rendering capabilities.