Firefox integrates an ad-blocker, but not to block ads

Firefox 149 quietly shipped an interesting new feature buried in the code. As Mozilla bug #2013888 documents, the browser maker incorporated Brave's Rust-based adblock engine back in March - a detail surfaced in a blog post by Shivan Kaul Sahib, VP of Privacy and Security at Brave. The important thing here is that although Firefox has picked up the core Rust code that Brave uses for its internal ad-blocker, that's not what Firefox is using it for.