For me it blocks some sites completely, until i disable it. And im using just the webrct flag, and not any kind of fingerprint protection extension. possum just works as filler for my nano adblocker to block etags
Brave with built-in "resist fingerprinting" feature enabled, and fingerprint sig. returns N/A result on browserleaks. With that feature disabled, and PP enabled, sig is clearly positive. Other than my own test, I am not qualified to say more. Honestly, I make some effort to avoid tracking generally, but trying to achieve perfection is analogous to running on a hamster wheel. Or, going down deep into a cave with an ultra-complex labyrinth inside.
Edit: Nano Adblocker is the extension I use consistently. uBO in FF, which I use less and less now with Brave Beta.
Privacy Possum blocks third-party fingerprinting and spoofs the readout of first-party fingerprinting. Explanation from its github page:
Fingerprinting usually aggregates information across many esoteric browser API's, so we watch for this behavior. When we detect it, we block it.
However many sites load first party fingerprinting code alongside other necessary code, like on reddit.com, so we can't simply block the script, or it will break the page. Instead when we see first party fingerprinting, we inject random data to spoil the fingerprint.
My favourite privacy related extensions that work for Brave for me are: Scriptsafe, Trace, Random User Agent & Browser Plugs Font & Glyph Protection. However for Chromium based browsers I have yet to find a decent Canvas Fingerprinting solution that hides my fingerprint, not blocking the canvas readout completely.
Currently, I'm finding Trace to be a worthwhile extension for Chrome, yes Canvas Fingerprint protection is enabled; hopefully it does something at least. Trace was the first responder for a questionable site (Taboola) trying to open up in default browser Chrome directly from MSN news app/"sponsored site".
It's a work in progress to find the least amt. of extensions doing the most multi-tasking. Anybody getting by with less than 3 ?