Google has rolled out "Privacy Sandbox," a Chrome feature first announced back in 2019 that, among other things, exchanges third-party cookies—the most common form of tracking technology—for what the company is now calling "Topics." Topics is a response to pushback against Google’s proposed...
Mobile FF on Android is just fine.
Firefox is great and works well on Android yes! I recommend Mull.
However, technically speaking, resources don't fully recommend it due to there being no per-site process isolation yet that works well.
If that doesn't matter to people then sure it's great and better than using Chromium based browsers. 🙂
It's just good to give everyone the information and reasoning why then let them decide.
Divest OS resource: https://divestos.org/pages/browsers#processIsolation
PrivacyGuides resource: https://www.privacyguides.org/en/mobile-browsers/?h=site#android