Chrome 150, due June 30, permanently disables Manifest V2 browser extensions, ending uBlock Origin for anyone still running it.
Google began phasing out Manifest V2 (MV2), the older extension framework, in 2024. Most Chrome users have already migrated to Manifest V3 alternatives like uBlock Origin Lite, or moved to a different browser. Chrome 150 removes the ExtensionManifestV2Disabled flag, the last toggle that kept MV2 extensions running for holdouts. Chrome 151, expected in July, will then strip out the remaining MV2 code entirely, closing the loop.
The practical consequence is a weaker ad blocker. Manifest V3 limits how extensions intercept network requests, so MV3-based blockers filter less than their MV2 predecessors. For users who depended on uBlock Origin's aggressive filtering for privacy or security reasons, "switching to the Lite version" is a downgrade, not an upgrade with a shorter name.
Google has framed the MV3 migration as a security and performance improvement throughout. The fact that it also reduces the effectiveness of tools that eat into ad revenue has, predictably, not been the part Google emphasizes.