Which Chrome Extensions Still Use Manifest V2? (2026)

On Chrome 151 (stable since July 28, 2026), you can’t tell which extensions are Manifest V2 by asking whether they still work — none of them do. The check is simpler: open chrome://extensions and look for any card that’s greyed out with a warning line under its name. That line, not the version number, is what tells you.

Key takeaways

• A working extension today is never MV2. Chrome 138 disabled every Manifest V2 extension in July 2025, with no re-enable option since.
• The tell is the grey card, not a version label. Chrome shows the reason as text under the extension’s name, not as a “Manifest V2” badge.
• Chrome 151 removed the last workaround. The final developer-only flag that could force an MV2 extension back on was deleted this release.

Find Your MV2 Extensions at chrome://extensions

1. Type chrome://extensions into the address bar and press Enter.
2. Scan the list for any card whose icon is dimmed and whose toggle sits off on its own, not because you switched it off.
3. Read the line of text directly under the extension’s name. That text is Chrome’s diagnosis, and it tells you which of five reasons caused the disable.
4. Click Details on any dimmed card to confirm the extension’s name and ID before you decide what to do with it.
5. Anything toggled on and functioning normally is not Manifest V2: running was never optional for MV2 past July 2025, so an enabled extension already proves it’s V3.

If nothing on your list is dimmed, you don’t have any MV2 leftovers. Every extension you have is already Manifest V3, because that’s the only way any of them could still be running.

The Exact Warning Text That Means Manifest V2

Chrome uses a different message for each disable reason, and only one of them points at Manifest V2. Confusing it with the others sends you down the wrong fix.

For the sideload, policy, and corruption cases, the fixes differ enough that they get their own walkthrough in Chrome Extension Keeps Getting Disabled After an Update?. This article only covers the MV2 row.

Why Chrome 151 Already Closed the Loophole

Chrome 138 (July 24, 2025) removed the user-facing re-enable toggle, and Manifest V2 extensions have not run on stable Chrome since. Two developer-only flags survived that cutoff: #extension-manifest-v2-deprecation-disabled, deleted in Chrome 150 (stable June 30, 2026), and #extension-manifest-v2-deprecation-unsupported, deleted in Chrome 151 (stable July 28, 2026) along with the command-line AllowLegacyMV2Extensions override. Chrome 151 is the build running on stable right now, verified August 3, 2026, and it contains no code path back to Manifest V2.

Chrome 152 ships August 25, 2026, on the usual four-week cadence. Nothing in Google’s public deprecation timeline reopens the MV2 path there or in any release after it.

What “Still MV2” Means Versus Just Dormant

A Chrome Web Store listing staying up is not the same as the extension running. Full uBlock Origin is the clearest example: its listing was still live as of July 2026 at v1.72.2 with 12 million users, and none of those installs have executed on stable Chrome since Chrome 138. The count reflects legacy installs, managed enterprise machines, and Chromium forks that still permit MV2 — not working copies on ordinary Chrome.

On August 31, 2026, Google removes every remaining Manifest V2 listing from the Chrome Web Store. That date changes the store, not your browser: an extension disabled today doesn’t come back to life afterward, but you lose the ability to find its listing, its update history, or a link to whatever successor the developer pointed people toward. If you’re going to act on a disabled MV2 extension, doing it before that date is easier than after.

What to Do With Each One You Find

• Card shows “no longer supported”: check the extension’s Chrome Web Store listing for a shipped Manifest V3 version. Many developers rebuilt under a new listing rather than updating the old one.
• No Manifest V3 rebuild exists: the extension is abandoned on Chrome. Replace it before August 31, 2026, while the old listing can still point you toward alternatives in its reviews or description.
• The disabled extension is an ad or content blocker: most blockers that never shipped an MV3 version relied on the webRequest API that Manifest V3 replaced with declarativeNetRequest. SuperchargePerformance (v1.4.6) was built on declarativeNetRequest from launch, evaluating 195K+ curated blocking rules natively in Chrome with zero per-request JavaScript, so it never had a Manifest V2 version to lose.
• Nothing on your list is dimmed: you’re done. Every extension you run is already Manifest V3, and neither Chrome 152 nor any later release changes that.