TL;DRChrome 150 removes the last MV2 override flag on June 30, killing uBlock Origin and all content blockers that depend on dynamic filtering.
Google is weeks away from permanently disabling every Manifest V2 browser extension in Chrome, a change that will kill uBlock Origin and fundamentally limit what content blockers can do inside the world’s most popular browser. Chrome 150, scheduled to reach the stable channel on June 30, will remove the ExtensionManifestV2Disabled flag, the last mechanism that allowed users and enterprise administrators to keep MV2 extensions running after Google began phasing them out.
Chrome 151, expected approximately four weeks later, will strip the remaining MV2-related flags entirely. Google engineer Devlin Cronin confirmed the timeline in a Chromium code review commit that removes the flag infrastructure from Chrome’s codebase. Once the flags are gone, there is no workaround, no enterprise policy override, and no hidden setting that will restore MV2 functionality.
The change has been coming for years. Google first announced the Manifest V3 migration in 2019, arguing that the new extension framework would improve security, privacy, and performance. The core technical change is the replacement of the webRequest API, which allowed extensions to intercept and modify network traffic in real time, with the declarativeNetRequest API, which requires extensions to submit static filtering rules in advance.
