Google Chrome 150 marks the end of full support for Manifest V2 extensions, effectively removing the remaining workarounds that allowed the original uBlock Origin to continue functioning in Chrome. Starting with Chrome 150 (expected in late June 2026), Google will complete its transition from Manifest V2 to Manifest V3. This means the powerful webRequestBlocking API used by advanced extensions will no longer be available for normal Chrome extensions. As a result, the original uBlock Origin will no longer work at full strength in Chrome. It relies on Manifest V2’s ability to inspect and block requests in real time. Under Manifest V3, extensions must use declarativeNetRequest, which requires them to rely on predefined filtering rules instead of dynamic blocking. This improves security and performance according to Google, but it also limits what ad blockers can do, especially against complex ads and trackers on sites like YouTube. The developer of uBlock Origin offers uBlock Origin Lite, a Manifest V3 version that still provides ad blocking but with the restrictions imposed by Chrome. Other ad blockers have also released Manifest V3 versions with similar limitations. Users who want the full power of the original uBlock Origin can switch to Firefox, which continues to support Manifest V2 extensions, or use Brave, which includes built-in ad and tracker blocking. Google has been gradually rolling out this change since 2024, and Chrome 150 marks the final step in that transition.

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