uBlock Origin

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. uBlock Origin (or uBlock₀) is not an ad blocker; it's a general-purpose blocker. uBlock Origin blocks ads through its support of the Adblock Plus filter syntax. uBlock Origin extends the syntax and is designed to work with custom rules and filters. Furthermore, the advanced mode allows uBlock Origin to work in default-deny mode, which mode will cause all 3rd-party network requests to be blocked by default unless allowed by the user.