My neutral (?) view on firefox/chrome: - Firefox uses way less RAM - Chrome is usually faster/smoother, even if not by much. For very odd or intensive sites. And for things like dragging a tab into another window and how long it takes until inspect element loaded. - Firefox has Tree Style Tab, Chrome doesn't and will never have. This alone makes FF the only usable browser for me - I find the non-optional non-native a…
My opposite viewpoint as a web developer: Chrome is faster and renders better than Firefox is pretty much every way. Safari delivers faithful color reproduction and speed. I spent 10x as much time fixing Firefox rendering issues compared to every other browser, including Microsoft Edge. Firefox has lost its edge. I do miss tree style tabs, though.
I develop sites in Firefox and then go for compatibility checking in other browsers.
Edge is normally fine.
Chrome is horrible. Atrocious. Abysmal. It implements lots of new features, but they are just so regularly buggy or badly implemented. To select the example I remember the clearest (there have been many more over the years): I went to use flexbox on one site and Firefox agreed with the spec (and what was obvious) on the treatment of some major item sizing issue while Chrome did something altogether different which I really couldn’t think of any justification for and which made flexbox a non-starter in that case. A year or two later they had fixed it in Chrome, but I’ve ever found it like that: Firefox has a slower rate of implementation, but normally implements things well; WebKit/Blink has a faster rate of implementation, but breaks things often (even with a handful of serious bugs in production releases that broke entire websites completely) and has always felt like a toy, rather than a serious, stable browser engine.