I use Firefox exclusively. Crashes:

  Report ID                                Date Submitted
  bp-5587943e-af6f-47c2-a76c-085760251104  2025-11-03T16:18-08:00
  bp-a96400f2-ce05-46df-a842-d7c960251102  2025-11-01T17:18-07:00
  bp-917e4083-c1d6-492a-b730-61dd70251028  2025-10-28T10:59-07:00
  bp-6556dab8-37ed-4a6e-9aab-965c70251021  2025-10-21T09:46-07:00
  bp-b706c918-4851-4006-95ff-a97a70251008  2025-10-07T21:07-07:00
  bp-769d1eee-2154-4336-a448-7343e0251001  2025-10-01T11:12-07:00
  bp-e8720d2c-bd70-4e20-ac97-7b81f0250926  2025-09-26T10:31-07:00
  bp-086eb3f5-0507-4a0c-8482-b4d890250916  2025-09-16T11:36-07:00
  bp-2aeacd1a-2bd3-4bdb-a748-a3d080250827  2025-08-27T11:10-07:00
  bp-5528185d-592b-486a-922e-e52bc0250821  2025-08-21T14:23-07:00
  bp-1e06d027-b690-45b4-b507-d11e70250815  2025-08-15T15:59-07:00
  bp-d0ecb20a-9a39-459d-b3bf-446df0250807  2025-08-06T20:21-07:00
  bp-208cc026-e144-46e7-a891-aaddb0250804  2025-08-04T08:50-07:00

Been crashing for me and friends for about a week now, mostly on youtube

Blame Youtube for that. It is very much in Google's interest to have Youtube misbehave on non-Google browsers.

No website should be able to crash a good web browser. It's totally a Firefox failure.

Is that tab crashes or whole browser crash? YouTube on Firefox appear to trigger memory leaks of some sort. I get routine tab crashes for that reason too, but not as much browser crashes.

Tab crashes sometimes, other times my browser gets slow and I restart the whole thing

That's on YouTube. It doesn't work well on anything now, and hasn't for a long, long while.

Works well on chrome and android. I've never had issues

Google has been caught red-handed causing deliberate issues for non-Chrome browsers. Try changing the browser-agent and see if you still have issues.

Firefox and Chrome use the same agent.