I wonder how many of the people who say "Firefox is significantly slower than chrome" are using windows... On my computer, Firefox IS slower than chrome but (with ad blockers enabled) by an insignificant amount. By still being "the last remaining mostly independent, maintained and reasonably popular browser" I'd prefer it to use over chrome even if it is a bit slower.
Of course, ms is no longer the "old micro$oft" but their history on how they handle competitor browsers makes one think how much interest they could have in investigating and fixing such a bug.
My takeaway is: prefer independent software as much as you can.
Firefox scored 89.5 ±1.7
Chromium scored 87.3 ±2.9
I guess that means Firefox did faster for those tests. I don't use Chrome or Chromium based browsers in general so I don't know how they compare in "feel".
I am on Linux.
Just for fun I also ran it on a Windows 11 mini-PC Ryzen 9 6900HX 3.3 GHz with no addons and obtained:
Edge: 291
Firefox: 196
I do not have Chrome installed but I believe Edge may be some fork of Chrome?