Technology

No, but you can use Ironfox or another Android Firefox fork and have working sync.

Waterfox does, I use it.

Edit: On Android.

IronFox

I use Librewolf everywhere but android where I use Firefox. The sync feature works perfectly between the different brands. Librewolf does not currently offer a mobile browser.

Mozilla is still the only company maintaining an alternative to Chromium (there's also webkit if you count Apple). Without Firefox you can't have Librewolf or other alternatives.

Mozilla is not perfect but people really need to stop treating them in a purely binary fashion (you are either horrible or are perfect).

You can criticize Mozilla for the direction they are taking with Firefox, but also you can argue that being a hardcore privacy-centric browser will kill interest for Firefox even faster.

I don't know the others but for me, it's the constant bugging with their users. I've used Firefox since the beginning, and they have made bad choices before, but this is the last straw. I'm tired of circumventing these choices, sometimes doing so is not even that transparent as a "kill switch" and users had to find strings in a cryptic about::config page, for example.

More important, I don't want so-called AI in my life. I couldn't care less about it. I won't use it unless it helps me to find some scientific conclusion that advances our culture, and I'm not talking something huge, I'm not saying it shouldn't be used at all. However, any use of AI for cotidian achievable tasks is morally unacceptable for me, and I'd ask for everyone a space for reflection on whether it is something filling a necessity in their lives. So, I guess it's a rupture for me with Mozilla. I can't use their product because I find it fundamentally wrong to support the massive use of technologies that barely do any good to society, and none to the planet. It's not about another little discrepancy on features and settings, it's about not giving people like me the platform to shout "fuck it, I don't want it, stop it now".

...leave iOS?

Haven't used iOS in a while, but I remember Orion being really good. It can install chrome extensions and Firefox add-ons.