This is the official development build of uBlock Origin. Use this development build of uBlock Origin if you want to help test new fixes since last stable release version, and to help find regression bugs. Report regression bugs at uBlock Origin issue tracker: https://github.com/gorhill/uBlock/issues IMPORTANT: if you wish to contribute by installing this development build, be sure to understand what is asked from you before opening a new issue: https://github.com/gorhill/uBlock/blob/master/CONTRIBUTING.md "uBlock Origin dev build" does not share any settings with the stable release of "uBlock Origin", they are installed as two distinct extensions. If needed, use the backup/restore feature of uBlock Origin to transfer settings between the two extensions. *** The stable version of uBlock Origin is at: https://www.crxsoso.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm