What? I agree with a lot of the Brave criticism and don't think they're perfect by any means, but saying they "sell telemetry data to advertisers" is just false and a completely baseless claim.
Firefox does not use Chromium. However, people get confused because when you mod FF you change the userChrome file with CSS.
FF has had that file name even before Google had a browser.
Hahaha I use their crypto to buy crypto I want so that's the reason I asked in the first place. But I guess I'll go back to Firefox, which is the browser I prefer anyways.