Firefox has had its issues over the years but time and again it's proven to be the most stable, most user friendly browser over the long term.
I think I switched from Firefox to Chrome at around 2010. At that time, Firefox was definitely not the most stable or the fastest browser out there, chrome was.
Switching back hasn't really been something that I'm willing to invest the time in at the moment, as it's easy to just download chrome, log in, and then have all your extensions, bookmarks, etc. come back to you.
I understand Firefox does that now, but it still requires me to find extension equivalents and migrate the data which frankly isn't worth the time.