uBlock Origin (uBO) BEWARE! uBO is (and has always been) COMPLETELY UNRELATED to the website ublock.org. IMPORTANT: About Google Chrome's "This extension may soon no longer be supported" uBlock Origin (uBO) is a CPU and memory-efficient wide-spectrum content blocker for Chromium and Firefox. It blocks ads, trackers, coin miners, popups, annoying anti-blockers, malware sites, etc., by default using EasyList, EasyPrivacy, Peter Lowe's Blocklist, Online Malicious URL Blocklist, and uBO filter lists...