The issue with firefox is sites don't develop or test on firefox and will outright just say use chrome/edge. e.g. on air india can't buy tickets (must use chrome, actually a _lot_ of india sites require chrome to just work), one of my work's agency website literal says on login to use chrome or edge.

I mostly blame mozilla "leadership" for going off on ridiculous directions and identity politics. They've reaped what they've sown. It's only because of short term corporate profits that chrome now has to claw back some ad revenue and by blocking ublock, now firefox gets some users back. The problem is that it's not new users.