There is plenty of legitimate criticism of Firefox in its handling of web standards. For example, they've effectively ended development and support for PWAs on desktop, which would have blown up the future of desktop PWA development (a crucial functionality of the web, as far as most are concerned) if Firefox held a significant portion of the market.
The FF contributors make so many decisions that are just plain nonsensical and harmful to the progression of the web, as do Safari and Opera -- especially those two. And while nobody should ever trust Google's bastardization of Chromium, they and the Chromium contributors are really the only people pushing the web forward, while everyone else is desperately trying to pump the breaks on new APIs, for reasons nobody can explain. Reading a bug tracker thread for any of them is like surviving a 1980s BBS discussion between tape storage format elitists. Even when they're correct, they're all wrong because they're not thinking ahead, and we all lose because of it.
The FF contributors make so many decisions that are just plain nonsensical and harmful to the progression of the web, as do Safari and Opera -- especially those two. And while nobody should ever trust Google's bastardization of Chromium, they and the Chromium contributors are really the only people pushing the web forward, while everyone else is desperately trying to pump the breaks on new APIs, for reasons nobody can explain. Reading a bug tracker thread for any of them is like surviving a 1980s BBS discussion between tape storage format elitists. Even when they're correct, they're all wrong because they're not thinking ahead, and we all lose because of it.