Firefox still crashes for me. Multiple computers and laptops, PC’s and Macs - it always crashes. I test it every few years and the crashes still occur. It makes it an unusable browser. Instead I use Brave.
It crashes with per-tab thread isolation? When was the last time you tried it? I don't believe I've had a single crash in the past five years and it's my daily driver.
Ditto, the only time I use Chrome is when some old portals in work require it. I've never had a crash in the past 8 years, but then again, I keep my tabs clean and have uBlock Origin.