Linux is pretty bad at handling out of memory. In my old thinkpad T14 with Mint everything came to a halt when webpack gobbled up my 16GB of ram. Couldnt even move the cursor, stuff just got stuck hard
Unfortunately Linux is pretty damn bad under memory pressure, I think you'd get an objectively better experience on macOS. I say this as someone running Asahi right now.
But then, you don't usually run into memory pressure with 8 GB and Linux unless you do a few specific things (for me with 32-128 GB depending on machine it's C++ builds using all cores and of course local LLMs). I guess a bunch of Electron apps would also do it for 8 GB.
Fair enough, Firefox is a bit better. But not that much, a lot of the bloat comes from unoptimised web pages running megabytes of JavaScript. Also, Firefox is close to a rounding error nowadays.
What does it matter how many other people use Firefox if it's the better browser for your situation?
FWIW I've never really considered Chrome: First it looked ugly (weird UI and bad font rendering on Linux), then Google gave itself permission to be evil and then they limited ad blockers. They fixed the font rendering at some point.