Mozilla has not proven themselves to be trustworthy, but I think most would still consider them to be less untrustworthy than Google. Firefox offers similar levels of support, feature parity, and performance to Chrome, which makes it an easy alternative to recommend. There are certainly other non-chromium options worth considering, but Firefox is still by far the most accessible.
No PWA support out of the box last time I looked. And Firefox (understandably but annoyingly) doesn't support some of the non-standardised Chrome APIs such as the File System Access API.
If you want to go with ethics and trust, I am not particular fond of Brave practice of replacing ads for some shady cryptocurrency (BAT). You don't have to do that, you can just use it as an adblocking browser, but if you don't care about these things, the news of Firefox updating some privacy policy shouldn't affect you too much either.
Anyways, both Firefox and Brave/Chromium are open source, you can see what data is being sent out, and there are forks.
And to make things clear, I am not really a fan of Mozilla direction, I just switched because Firefox became better and Chrome worse in the last years.
