yeah im not saying mozilla will be our savior, and ladybird/servo are promising but nowhere near complete. the biggest difference is that firefox is open source, you can build the browser with none of that stuff in it, and yeah thats not easy for most users, but most users dont care and wont do it anyways. chrome on the other hand, yeah chromium is "open source" but most of the important stuff that chrome based browsers actually use are not open source, and they are more than willing to take features away from users because if they didnt they would lose money, just like how they have done with manifest v3 and adblockers. at the end of they day we dont have a good browser, and thats a shame, because its a really insurmountable task without proper funding.

Both have ads baked in. Brave turns them off by default but tries to get you to turn them on and gives you fractions of a cent in crypto if you do. Mozilla has them on by default.

What ads does Firefox have?

Both have bundled things in their browser. Brave it was their VPN and affiliate link scandal. Mozilla was plugins like the Mr Robot plugin and changing people’s search engines to Bing without their consent when negotiating with Google.

The Mr. Robot plugin stopped being auto-installed a day after people complained about it back in 2017 (7 years ago), and I don't think this ever happened again, while Brave still does its thing to this day (to my knowledge), I haven't been able to find any info on that second point.

Both have made fringe political donations

Which fringe political donations has Mozilla made?

To be fair, I wouldn't trust stock Firefox indeed, as it also has bad defaults and has demonstrated disrespect to users' consent (like turning on the ad tracking option without even informing anyone). I would rather opt for a hardening user.js or a fork with them pre-applied, like Librewolf.