Firefox Has Quietly Integrated Brave's Adblock Engine

Firefox 149 quietly shipped adblock-rust, Brave's open-source Rust-based ad and tracker blocking engine, without mentioning it in the release notes. The integration was filed as a Bugzilla bug titled 'Add a prototype rich content blocking engine' and is currently disabled by default with no UI or filter lists. The engine supports uBlock Origin-compatible filter list syntax and handles network request blocking and cosmetic filtering. Waterfox, a Firefox fork, has also adopted the same implementation. A step-by-step guide is provided to enable and test the feature via about:config using EasyList and EasyPrivacy filter lists.