SponsorBlock is a free and open-source browser extension designed to skip (block) sponsorship segments in YouTube videos. The extension relies on a user-submitted database to identify sponsorships in videos. Extension users can submit segments in videos and vote on segments others have submitted. The extension is a recommended extension on Firefox's add-on store. As of January 26, 2023[update], the extension has 271,343 users on Firefox and over 900,000 users on Google Chrome. SponsorBlock segment retrieval API observes 20-anonymity.
