Here’s an article that goes over it in more detail. He was CEO of Mozilla for 10 days then was forced to resign, after 3 board members resigned in protest at his accession. He donated to support Proposition 8 in California, which banned same-sex marriages in the state.

Aside from that, Brave is also just not a good browser. They advertise themselves as “the privacy-focused browser” when Firefox has better in-built protections. In this support article they claim Brave is a better private browser than Tor. It’s misleading at best, because their argument comes down to the fact Tor loads pages slower. Brave has been caught redirecting users through affiliate links that benefit the company without users consent.

They’re also at the whim of the Chromium project and Google. That means that Google’s recent website DRM project would be included in Brave unless they forked the Chromium codebase. Which would require a lot more work than I think they’re ready to put into it.