There are 2 reasons why I'm using chromium (with ublock origin lite) over Firefox:

1. Chromium is significantly faster (maybe 5 to 10x faster on certain tasks mostly around canvas but anything that requires fast ui really). Every time I use Firefox it feels like it has some kind of serious problem. If chrome was this slow I would stop working and start investigating what part of my computer is broken. This experience hasn't changed over span of 10 years, 3 OSes and several computers.

2. Neverending caching issues on Firefox. It just caches too aggressively which makes development really annoying to a point where anytime I encounter issue on Firefox my first thought is "Is this Firefox caching issue?". On chrome when I change button color and I don't see it, I know I made a mistake. If I change button color on Firefox, my first thought is, is this Firefox caching issue? When I develop web I have very quick update loop and I really can't be questioning browser. I cannot work like this. Firefox is unusable for me.

Ctrl + shift + R would solve your second problem at all times.

And I don't think your first point is quantified correctly and I am sure there is no data to back it up. But I understand the appeal of trying to quantify your personal experience.

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