Based on https://privacytests.org
Desktop browsers in their current stable versions, sorted from better (left) to worse (right). These are:
Librewolf, Mullvad, Brave, Tor, Safari, Chromium/Ungoogled, Firefox, Edge, Opera, Vivaldi, Chrome.
Note: Each test is counted with a value of one in this chart, however each test may not have an equal importance in regard to privacy. It still gives an image of which browsers value privacy and which do not.
The maximum (worst possible) score is 143.
Edit: Also FUCK BRAVE. But for other reasons than these points. Read the description before you vote or comment ffs…
Firefox tries to keep its defaults on the ‘functional’ side of safe. Firefox will pass almost every test on here by changing some settings away from default to more strict (like the enhanced privacy tracking), but doing so can actually break some websites. That said, this is a brave ad. A big tip off for me is GCP. Its development was supported by the Mozilla foundation but Firefox gets a ‘fail’ here because it isn’t on by default. No test that expects a user to know what all these things are could also reasonably expect a user to not check if they’re enabled. A fair test would have been to rate all these browsers with their defaults AND hardened (without plugins). Keep in mind Brave doesn’t give you the choice to disable GCP, they dictate what you can and cannot do in this regard, so it isn’t possible to A/B test Brave’s behavior in a lot of these cases.
I can guarantee you it is not a “Brave ad” (again, sigh), I am a Firefox user which found this website with a bunch of tests. I am not claiming it is perfect, the best thing would be able to weigh different tests based on importance. But I am not aware of any website with more accurate data. Do you a link to one? I’d be happy to make another, better one.