And meanwhile I've been having no trouble with Firefox, but had to stop using Palemoon because too many websites were breaking consistently.

Firefox is my next item up the chain if PM has trouble. Trouble with individual browsers isn't my biggest problem; my work blocks so many things. Youtube has stopped working. Most of the cool ShowHN demo projects don't work (when they do once I get home, I mean).

I find that Firefox works well enough for my normal need. My other two browsers are SeaMonkey & PaleMoon (sense a pattern?). The only alternative browser I use is Links.