SOFTWARE It's in Waterfox too, and there it does what you'd expect 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. Right now, in fact, it's disabled by default, but as a post from the official Firefox Reddit account says: The Firefox team is experimenting with ways to improve the built-in Enhanced Tracking Protection feature in Firefox. This is one of the libraries we're going to experiment with... Note: We are not bundling Brave's ad-blocking system, we're testing one of their open source Rust components to improve how Firefox processes tracker lists.…