Google Chrome has removed the last feature flags for Manifest V2, effectively disabling MV2 extensions like uBlock Origin in upcoming Chromium 151 builds. Other Chromium-based browsers—Edge, Opera, Brave—face similar transitions, though some may delay MV2 removal, and users can switch to MV3 versions or alternative browsers like Firefox.

• Chromium 151 removes the remaining flags (ExtensionManifestV2Unsupported, ExtensionManifestV2Availability, likely AllowLegacyMV2Extensions), killing workarounds like the registry tweak that kept uBlock Origin alive.
• Edge already blocks uBlock Origin as of February, and Opera—despite promising longer MV2 support—is signaling the same phaseout, leaving Brave and possibly Vivaldi as the only holdouts.
• uBlock Origin Lite (MV3) works on Chrome now but performs worse than the original; Firefox remains the only major platform supporting both MV2 and MV3 without issues.