It’s close to losing me too. I stuck with it in a major part to prevent a monoculture, but It’s much slower than Chrome, causes major memory issues on my machine (M1 Mac) and with Mozilla on a kamikaze mission I don’t think it’s going to get better any time soon.
Literally the only thing keeping me there are Tree Style Tabs/Sidebery. Give me a Chrome based browser with that and I’ll switch (Edge’s vertical tabs don’t really count, it’s still not a tree).
I see many reasons for Firefox’s demise, but TL;DR I’m just done.