Firefox has announced that it will continue to support uBlock Origin, a popular ad-blocking extension, despite other major browsers like Microsoft Edge phasing it out due to Manifest V3. This move makes Firefox the only major browser to still support uBlock Origin. The decision is seen as a significant advantage for Firefox, as users who value ad-blocking may switch to the browser. Firefox's support for uBlock Origin is in contrast to other browsers that are based on Chromium, which is phasing out support for Manifest V2 extensions.