BEWARE! uBlock Origin is (and has always been) COMPLETELY UNRELATED to the web site ublock.org. An efficient blocker add-on for various browsers. Fast, potent, and lean. uBlock Origin is NOT an “ad blocker”: it is a wide-spectrum blocker — which happens to be able to function as a mere “ad blocker”. The default behavior of uBlock Origin when newly installed is to block ads, trackers and malware sites — through EasyList, EasyPrivacy, Peter Lowe’s ad/tracking/malware servers, Online Malicious URL Blocklist, and uBlock Origin’s own filter lists. Free. Open source. For users by users. No donations sought.