What Chrome 150 Changes for uBlock Origin Users
Chrome 150’s release marks the end of full-strength uBlock Origin on Chrome, as Google removes Manifest V2 support and forces all ad blockers onto the more limited Manifest V3 framework, reducing how precisely extensions can filter ads, trackers, and unwanted network requests. For the roughly 40 million people who built their browsing around the original uBlock Origin Chrome extension, this is not a routine upgrade; it is the point where the extension stops loading altogether. Chrome 150 removes the last internal flag, ExtensionManifestV2Disabled, that power users could toggle to keep the legacy version alive. Chrome 151 will then strip remaining Manifest V2 code paths, so there will be no hidden switch to bring it back. According to a Chromium commit cited by multiple reports, this code is now treated as dead, partly due to growing security bugs tied to the old extension model.
Manifest V3: Why Ad Blocking Gets Weaker
Under Manifest V2, uBlock Origin could inspect each network request in real time and cancel ads before a page loaded, using large, dynamic blocklists and per-site rules. Manifest V3 replaces that with declarativeNetRequest, where extensions submit rule sets to Chrome and the browser’s own engine decides what can be blocked and how. That shift matters for anyone who relies on powerful content blocking, because it removes dynamic filtering and many cosmetic tweaks that made pages look clean after ads were stripped out. CyberNews has summarized the impact: Chrome will “no longer support dynamic filtering, limiting how Chrome extensions block ads, trackers, and other unwanted content before pages load.” Raymond Hill, uBlock Origin’s developer, has estimated that MV3 limits cut blocking effectiveness by about 30 to 40 percent compared with the full Manifest V2 version.
uBlock Origin Lite and Other MV3 Ad Blockers
After the Chrome 150 release, full uBlock Origin Chrome will no longer run, and the Web Store steers users to uBlock Origin Lite and other Manifest V3 ad blockers. uBlock Origin Lite is free and handles most ordinary display ads without any configuration, which will be enough for casual users who mainly want fewer banners and pop-ups. However, it loses several features that power users rely on: dynamic filtering, consistent cosmetic filtering of leftover ad spaces, and many tricks used to bypass anti-adblock walls. Some aggressive ad networks now slip through more often than they did under the classic extension. You can extend Lite’s filter lists to improve results, but it still has to obey Chrome’s rule limits and allowed rule types. Similar constraints apply to other MV3 blockers such as updated AdGuard extensions, which offer convenience but less fine-grained control.
Best Options: Switch Browsers or Accept Weaker Blocking
For anyone who cares about strong content blocking, the real decision is not which Manifest V3 ad blocker to pick but whether to stay on Chrome at all. Firefox continues to support Manifest V2-style extensions alongside MV3, so the full uBlock Origin runs there without restrictions and behaves much like it did on Chrome before this change. Brave takes a different route, building its Shields ad blocker into the browser itself, outside the extension system, so Chrome’s rules do not apply. Other Chromium-based browsers such as Microsoft Edge and Opera are expected to follow Chrome in removing MV2 code, so they offer little long-term relief. That leaves three paths: switch to Firefox or Brave, accept the reduced protection of MV3 blockers, or live with more ads and tracking on Chrome.
