Chrome Extension No Longer Available? 3 Checks (2026)

You click the icon in your toolbar and it is greyed out. You open the store page: “no longer available.” Chrome 138 (July 24, 2025) stopped running Manifest V2 extensions. The Chrome Web Store deleted every remaining MV2 listing on August 31, 2026. Your extension stopped working over a year before its listing vanished.

Key takeaways

• Chrome 138 (July 24, 2025) stopped MV2 extensions from running. The August 31, 2026 store purge then deleted the listing.
• Three checks identify whether your extension was MV2 and what the greyed icon means.
• MV3 replacements cover three classes of the deleted tool’s work: ad blocking, tracker blocking, and tab organization.

What the August 31 purge actually changed

The sequence ran across 13 months. Chrome 138, released July 24, 2025 (13 months before this article’s September 2026 publication), disabled Manifest V2 for consumer installs on all update channels. Chrome 139 removed the ExtensionManifestV2Availability enterprise policy that had let organizations keep MV2 running past that cutoff. The Chrome Web Store deleted every remaining MV2 listing on August 31, 2026. Google set that date in a July 8, 2026 support-page edit; Google’s MV2 timeline page lists the August 31, 2026 store removal as completed.

Three things closed with that deletion. The store page, which now renders as a dead link or a “no longer available” stub. The install path, meaning no new machine or fresh profile can pull the extension from the store. The update channel, meaning the developer’s publish pipeline no longer reaches that listing.

What remains on your disk is inert. The extension’s local files and any stored configuration persist, but nothing executes. Chrome 151 (July 28, 2026) removed the last MV2 code paths from the browser, so no flag, developer-mode toggle, or sideload revives the extension. The listing, the reinstall path, and the update channel are closed, and they are closed permanently.

Two losses matter in practice. The first: the daily workflow the deleted tool handled (blocking ads, organizing tabs, optimizing page loads) now has no store path to a fresh install on a new machine or after a browser wipe. The second: every saved link, forum answer, or “just install it from the Chrome Web Store” instruction that still points at the old listing ends on a dead page. You spend the time following the path before you hit the wall.

Three checks: is your extension affected

Check 1: Is your extension Manifest V2? Open chrome://extensions in your address bar. Find the extension in the list and expand its card. The manifest version appears in the details section. If it reads “Manifest V2,” your listing was among the ones deleted on August 31. If it reads “Manifest V3,” the purge did not touch your extension and the rest of this article is background.

Check 2: Is the greyed icon the MV2 disablement? Look at the toolbar icon. If it is greyed out and unresponsive, that is Chrome 138’s MV2 disablement from July 24, 2025, not a crash or a policy override. The browser stopped the background page in mid-2025, well before the store deletion. If the icon is colored and responds to a click, your extension is MV3 and the purge did not touch it.

Check 3: Will it receive updates? Navigate to the extension’s Chrome Web Store page. If it shows “no longer available” or returns a 404, the update channel is closed. The local files and stored configuration persist on disk, but nothing executes. The dead listing closes every store path to a working version.

MV3 replacements by class

The table below maps each common class of deleted tool to the MV3 options that cover the same ground. Find the row that matches what your deleted extension actually did for you.

If your deleted tool was a blocker or an optimizer, the SuperchargePerformance row is the direct path forward. It combines the 195K+ rule set with tab suspension and per-domain auto-protection in a single MV3 build that updates through the normal store channel. If the tool organized tabs or switched between workspaces, SuperchargeNavigation covers that ground.

What to do next

The installed copy does not run. Chrome 138 (July 24, 2025) stopped MV2 background pages, and Chrome 151 (July 28, 2026) removed the last MV2 code paths, so there is no way to revive the extension. The August 31 store deletion closed the listing on top of that. Your next move depends on what the deleted tool handled for you.

Map the next step to what the deleted tool actually did:

If it blocked ads or optimized page loads, install SuperchargePerformance (v1.4.7, MV3, live on the store as of September 2026). The 195K+ declarativeNetRequest rule set and 34-domain auto-protection cover the blocking and optimization work in one extension that receives updates through the normal channel.

If it organized tabs, managed workspaces, or switched between sets of tabs, install SuperchargeNavigation (v1.3.4, MV3).

If you are unsure which class the deleted tool was, go back to Check 1 and the store category the listing used to carry. Blockers and optimizers map to SuperchargePerformance. Tab and workspace managers map to SuperchargeNavigation. Both are MV3 extensions live on the Chrome Web Store as of September 2026, and both close the gap the deleted listing left behind.