Chrome Extensions Missing, Disabled or "No Longer Supported"? Every Fix (2026)

To find your extensions in Chrome, click the puzzle-piece icon to the right of the address bar, or type chrome://extensions into the address bar. To keep one on the toolbar, open the puzzle menu and click the pin next to it. If an extension has vanished or been turned off, check chrome://extensions for a message under it. Here is the change many people still have not caught up with: since Chrome 138 (July 2025), Chrome turns off every extension built on the older "Manifest V2" format, and from Chrome 139 there is no toggle, flag or policy to turn them back on. That is why the original uBlock Origin and many older tools stopped working. Re-enabling them is impossible; the fix is a current version, a replacement, or a different browser. This page covers that and every other reason extensions go missing.

Ethan's mother runs a small online shop and relies on a handful of Chrome extensions: a grammar checker, a password manager, a price tracker and an ad blocker. One morning the ad blocker was gone from the toolbar, the price tracker said "This extension is no longer supported", and the grammar checker's icon had vanished too. She assumed Chrome had been hacked. At Jake's shop it turned out to be three ordinary things: the ad blocker and price tracker were old Manifest V2 extensions that Chrome had switched off, and the grammar checker was simply unpinned after an update. A Lite version of the ad blocker, a maintained alternative price tracker, and one click on a pin later, her browser was back to normal. This page walks through each case so you can tell them apart.

Extensions live inside your Chrome profile, not in Windows, so none of this involves uninstalling Chrome or touching system settings. Your bookmarks, passwords and history are separate from extensions and are not affected by anything below unless a step says so.

Why extensions disappear: every cause at a glance

Where are extensions in Chrome?

• Puzzle-piece icon: to the right of the address bar. Click it to see every extension that can run on the current page, with a pin for each and a link to Manage extensions.
• chrome://extensions: type it in the address bar for the full list with on/off switches, details, errors and the Remove button.
• Menu: click the three dots at the top right, then Extensions > Manage Extensions, or Visit Chrome Web Store to add new ones.
• Keyboard shortcuts page: chrome://extensions/shortcuts sets keyboard shortcuts for extensions.

Older guides, including the 2016 version of this page, describe extensions living in the History or Settings pages. Chrome moved them years ago; the puzzle icon and chrome://extensions are where they live now.

Check your Chrome version

Many extension questions depend on your Chrome version, especially anything about Manifest V2. Open the three-dot menu, then Help > About Google Chrome, or type chrome://settings/help. Chrome shows the version number and checks for updates. Any version from 139 onward runs no Manifest V2 extensions at all. If your Chrome is much older than the current release, update it first; old versions miss security fixes, and extensions built for current Chrome may not install on them. On a work PC, IT may hold Chrome at a specific version, and the page will say updates are managed by your organization.

Chrome normally updates itself in the background and asks you to relaunch when a new version is ready, shown by an Update button or colored dot on the menu. Relaunching restores your open tabs, so there is no reason to postpone it for long.

Extension icon missing from the toolbar: pin it

1. Click the puzzle-piece icon.
2. Find the extension in the list.
3. Click the pin icon next to it. It turns blue and the extension's icon appears on the toolbar.
4. Drag pinned icons left or right to reorder them.

Chrome updates sometimes reset which extensions are pinned, especially after a profile sync or a big version change, so a missing icon after an update is usually just unpinned. If the extension is not in the puzzle list at all, it may be turned off, removed or blocked; open chrome://extensions to check. If the puzzle icon itself is missing, current versions let you show it from the three-dot menu's Extensions entry or by right-clicking the toolbar; some extensions also open in the side panel rather than as a toolbar popup, so check the side panel button too.

Extensions in the side panel

Some current extensions open in Chrome's side panel rather than a small popup under the toolbar icon. They show next to the page, which suits note-takers, reading tools and AI assistants. If you cannot find such an extension's interface, click the side panel button on the toolbar and choose it from the panel's menu at the top. You can pin side panel features to the toolbar the same way as other extensions. When an extension seems installed but nothing happens when you click it, check whether it opened in a side panel that is closed or hidden behind another panel.

"This extension is no longer supported": the Manifest V2 shutdown

Chrome extensions are built to a specification called the manifest. The older Manifest V2 gave extensions broad powers, including the ability to inspect and block every network request, which ad blockers and privacy tools relied on. Google replaced it with Manifest V3, which limits those powers in favor of declared rules. The switch-over happened in stages:

• 2024: Chrome began warning about and then disabling Manifest V2 extensions, at first with an option to turn them back on.
• Chrome 138, July 2025: Manifest V2 extensions disabled for all users, with no switch to re-enable them.
• Chrome 139, August 2025: support removed completely, along with the enterprise policy that had kept them running in organizations.

So if an extension shows "This extension is no longer supported" or has been switched off with no way to turn it on, it is a Manifest V2 extension, and on current Chrome it will not run again. Searching for flags or registry tricks wastes time; there is no supported method on Chrome 139 and later. The real options are in the next sections.

What to do about a Manifest V2 extension

1. Look for an updated version. Many developers rebuilt their extensions on Manifest V3. Search the Chrome Web Store for the same extension; the store page shows the latest version and when it was updated. Remove the old copy and install the current one.
2. Use the developer's "Lite" or V3 edition. Some popular extensions released a separate Manifest V3 edition with a slightly different feature set. uBlock Origin's developer, for example, publishes uBlock Origin Lite for Chrome.
3. Pick a maintained alternative. For extensions whose developers stopped work, choose a well-reviewed, recently updated replacement with a similar purpose. Check its permissions before installing.
4. Consider another browser for that task. Firefox continues to support the network-blocking capabilities that many content blockers use. Other Chromium-based browsers make their own choices about Manifest V2, which can change; check their current policy before switching for this reason alone.
5. Remove the dead extension from chrome://extensions, so it stops cluttering the list and leaves no stale permissions behind.

Ethan's mother kept Chrome, installed the Lite edition of her ad blocker, found a maintained price tracker, and removed the two dead extensions. Ten minutes in total.

Ad blocking after Manifest V2

Ad blockers were hit hardest by the change, because Manifest V2 let them examine and block every request in real time, while Manifest V3 asks them to hand Chrome a list of rules in advance. In practice, a good Manifest V3 blocker still removes most ads and trackers on most sites. Differences you may notice are in advanced features: very large custom filter lists, some dynamic filtering modes and certain cosmetic fixes may be limited, and filter list updates may arrive with extension updates rather than continuously. For most people, a reputable Manifest V3 blocker, or the Lite edition of their old one, is enough. People who rely on advanced filtering often keep a second browser that supports full blocking for heavy browsing.

Whatever you choose, avoid installing several blockers at once. They overlap, break sites more often, and slow pages down. One well-maintained blocker, with exceptions added for sites you want to support, gives the best result.

What each extension message means

• This extension is no longer supported: Manifest V2, see above.
• This extension may soon no longer be supported: an older warning shown before Manifest V2 extensions were switched off. Act on it before it stops working.
• This extension contains malware or violates the Chrome Web Store policy: Google disabled it for safety. Remove it, change passwords if it had access to sites where you sign in, and run a malware scan.
• This extension is not listed in the Chrome Web Store and may have been added without your knowledge: installed from outside the store. Remove it unless you installed it deliberately for development.
• Installed by your administrator: forced by a policy; you cannot remove it from Chrome.
• This extension may have been corrupted: click Repair.
• Errors button: the extension logged errors; useful for reporting problems to its developer.

The same states appear as switches and labels on chrome://extensions. This table shows what each means and what you can do:

The last row catches people out: when an extension update asks for more access than before, Chrome switches it off until you approve. Read what it is asking for before accepting; a sudden request for access to all sites from a simple tool is a reason to be cautious.

All your extensions disappeared at once

When every extension vanishes together, the cause is almost never the extensions themselves:

1. Check the profile. Click the profile picture at the top right. If you see a different name, or Guest, switch to your usual profile. Each profile has its own extensions.
2. Check you are not in Incognito. Extensions do not run in Incognito unless you allow each one. A dark window with the Incognito icon is the clue.
3. Check you are signed in and syncing. Open chrome://settings/syncSetup and make sure sync is on and Extensions is included. After signing in on a new PC, extensions sync back automatically within a few minutes.
4. Check for a reset. If someone used Reset settings, every extension was turned off but not removed. Turn them back on in chrome://extensions.
5. Check for a new or repaired Chrome install. A fresh install with a new profile starts empty; sign in to sync to restore extensions.

Work and personal profiles: keeping extensions separate

Chrome profiles are the tidy way to keep work and personal browsing apart, each with its own extensions, bookmarks and sign-ins. If you sign in to a work Google account, Chrome may create a separate managed profile for it, where your organization's extension rules apply, while your personal profile keeps its own. That is often why an extension "disappears": you are in the work profile, where it is not installed or not allowed. Give each profile a distinct name and color under its profile settings, so you can tell at a glance which one a window belongs to.

If you use the same PC for work and home, avoid installing personal extensions in the work profile. Your organization may be able to see extension activity there, and a personal extension that misbehaves could put work data at risk. Keep the work profile lean and let IT's approved list do its job.

Extensions in Incognito and Guest windows

Extensions are off in Incognito by default, because they could otherwise record what you do in private browsing. To allow one, open chrome://extensions, click Details on the extension, and turn on Allow in Incognito. Only do this for extensions you trust completely, such as a password manager. Guest windows never run extensions; they are designed as a clean, temporary browser for someone else.

If an extension you allowed still does not work in Incognito, close every Incognito window and open a new one; the setting applies to new windows. Also note that some extensions, such as sync or account tools, deliberately refuse to work in Incognito to protect your privacy, even with the switch on.

Extension installed but not working on a site

Chrome lets you control which sites each extension can read and change. If an extension works on some sites but not others, open the puzzle menu on that site, click the three dots next to the extension, and check This can read and change site data: When you click the extension, On this site, or On all sites. Setting it to On this site fixes many "it does nothing" problems. In chrome://extensions > Details > Site access, you can set it once for all sites. Also check Allow access to file URLs if the extension needs to work with local files such as PDFs opened from your drive.

Corrupted or broken extensions: repair or reinstall

If an extension shows Repair, click it; Chrome downloads a fresh copy. If it misbehaves without a message, toggle it off and on, then restart Chrome. Still broken? Remove it and reinstall from the Chrome Web Store. Settings stored by the extension may be lost when removing it, so check whether it offers an export or sync option first, as many password managers, note tools and tab managers do.

Repeated corruption messages for several extensions at once usually mean something else on the PC is interfering: security software scanning Chrome's folders, a failing drive, or a cleaning tool deleting cache files. Check your security software's logs, run a drive health check, and stop any cleaning tool from touching browser data.

"Installed by your administrator" or "Managed by your organization"

On a work or school device, IT can force-install, block or allow extensions. You will see a building icon and Your browser is managed by your organization in the menu. You cannot change those extensions yourself; ask IT. On a personal PC that shows this message unexpectedly, a leftover policy or unwanted software has set one. Open chrome://policy to see what is set. Check Settings > Accounts > Access work or school in Windows and disconnect old accounts; then look in Registry Editor under HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome and HKEY_CURRENT_USER\SOFTWARE\Policies\Google\Chrome. Export these keys as a backup, then delete entries you did not set, such as ExtensionInstallForcelist entries pointing at unknown extensions, and restart Chrome. If entries come back, run a malware scan, because unwanted software often re-creates them.

When an extension is the problem

Extensions can see a lot: pages you visit, what you type, sometimes your cookies. Most are honest, but extensions occasionally change hands and receive harmful updates. Warning signs include new pop-ups or ads on sites that never had them, your search engine or new tab page changing, an extension you do not remember installing, or one asking for new permissions after an update. Remove anything suspicious, run Safety Check under chrome://settings/safetyCheck, which flags unsafe or unused extensions, and run a Microsoft Defender scan. Change passwords for important accounts if a harmful extension had access to all sites.

On a family PC, a quick way to spot trouble is to open chrome://extensions in each profile now and then. Children and less confident users are the most likely to accept an extension offered by a game or download site, and those offers are a common source of adware.

Report a harmful extension

If you find an extension that injects ads, redirects searches or steals data, report it so others are protected. Open its Chrome Web Store page and use Report abuse or the flag option, choose the closest reason, and describe what you saw. Then remove it from your browser. Reports, together with Google's own scanning, are how harmful extensions get taken down and disabled on everyone's PCs, which is when the "contains malware" message appears for other users.

If the extension had access to sites where you sign in, also review recent activity on your important accounts, such as email, banking and shopping, and sign out of other sessions from each account's security page. Turning on two-step verification for those accounts limits the damage a stolen password or cookie can do.

Review extension permissions

Open chrome://extensions, click Details, and read Permissions. "Read and change all your data on all websites" is a powerful permission; it is necessary for ad blockers and password managers but not for a simple color picker or timer. Fewer extensions with fewer permissions means less risk and a faster browser. A good habit is a twice-yearly review: remove anything you have not used in months, and reduce site access to On click for extensions you use only occasionally.

Chrome's Safety Check also helps here: it lists extensions that have been unpublished from the store, flagged as malware, or that have not been used in a long time, and offers to remove them. Running it once a month takes a few seconds.

Extensions that need broad access, such as password managers and ad blockers, are worth paying attention to precisely because they need it. Choose ones from long-established developers, keep them updated, and do not install two that do the same job.

Installing extensions safely

• Use the Chrome Web Store, reached from the three-dot menu, rather than links on random sites.
• Check the publisher: the developer's name and website, and badges such as Featured or Established publisher, which the store gives to developers who meet its standards.
• Check the numbers: user count, rating, number of reviews and, importantly, the date of the last update. An extension not updated in years is a candidate for trouble.
• Read recent reviews, sorted by newest; complaints about sudden ads or changed behavior often appear there first.
• Read the permissions before clicking Add extension, and ask whether they match what the extension claims to do.

A few minutes of checking avoids the most common extension problems, including the slow, ad-filled browser that sends many people to a repair shop.

Unpacked and developer extensions

Extensions loaded with Developer mode and Load unpacked run from a folder on your PC. If the folder is moved, renamed or deleted, or Developer mode is turned off, the extension disappears or fails. Turn Developer mode back on in chrome://extensions, click Load unpacked, and choose the folder again. Chrome may show a warning about developer-mode extensions at startup; that is expected. Avoid installing unpacked extensions from strangers; they bypass the Web Store's review.

Packed extensions in the .crx format, downloaded from websites, cannot be installed by dragging them into Chrome anymore on Windows unless they come from the Web Store or are allowed by policy. That is deliberate protection against extensions installed behind your back.

Getting extensions back on a new PC or after reinstalling

Signed-in Chrome syncs your extension list to your Google account. On a new PC, install Chrome, sign in, turn on sync, and your extensions reinstall automatically from the Chrome Web Store. Extensions that are no longer in the store, including removed Manifest V2 ones, cannot be restored this way. Some extensions sync their own settings; others keep them only on one PC, so export settings where offered before changing PCs.

If an extension did not come back after signing in, check that sync for Extensions is on, and look at the extension's store page: it may have been removed, renamed or replaced by a new listing. Searching the developer's name in the store usually finds the current version.

After a Windows reset or a new Windows account

A Windows reset or a new Windows user account starts Chrome with an empty profile. Install Chrome, sign in to the same Google account and turn on sync, and your extension list returns. Extension settings stored only locally do not return, which is why exporting settings from important extensions, or using their own sync, matters before any reset. If you used Chrome without signing in, there is nothing to sync from; rebuild the list from your notes or screenshot.

Moving from one PC to another is the same story. Sign in on the new PC first, wait a few minutes for sync to finish, then open chrome://extensions to confirm everything arrived before wiping or returning the old machine. That small check catches any extension that has to be reinstalled by hand.

Keep a record of your extensions

Chrome has no export button for your extension list, so keep your own record. The simplest way is a screenshot of chrome://extensions, or a short note listing each extension and why you use it. That list makes rebuilding after a reset or on a work PC quick, and it is also a good moment to ask whether you still need each one. For extensions with important settings, such as a password manager, notes tool or tab organizer, use the extension's own export or sync feature, because those settings are not part of Chrome sync.

For families who share a PC, the same list helps when setting up a child's or parent's profile: install only the few extensions they actually need, rather than copying everything from your own profile.

Fix a damaged Chrome profile

If extensions keep disappearing, Chrome crashes, or settings will not save, the profile may be damaged. The cleanest fix is a new profile: click the profile picture, choose Add, sign in, and turn on sync so bookmarks, passwords and extensions come across. Use it for a few days; if all is well, remove the old profile. Advanced users can rename the profile folder, found under %LocalAppData%\Google\Chrome\User Data (usually Default), with Chrome closed, so Chrome creates a fresh one; keep the renamed folder until you are sure nothing is missing.

A new profile also tells you whether the problem is the profile or something wider. If extensions work fine in a new profile, the old profile was damaged. If they fail in every profile, look at policies, security software or the Chrome installation itself; reinstalling Chrome from google.com/chrome over the top repairs the program while keeping profiles.

Reset Chrome settings (and what it does to extensions)

chrome://settings/reset > Restore settings to their original defaults resets the start page, new tab page, search engine and pinned tabs, clears temporary data such as cookies, and turns off all extensions. It keeps bookmarks, history and saved passwords. Use it when the browser has been hijacked or behaves strangely. Afterward, turn back on only the extensions you trust. Our guide to resetting a Chromium browser shows the same process in Edge.

If you reset because of unwanted ads or a hijacked search engine, also check chrome://settings/searchEngines for engines you did not add, and look in Windows' Installed apps for programs installed around the time the problem started; browser hijackers often come with a desktop helper that would undo the reset.

Extensions in Microsoft Edge

Edge is built on the same Chromium base and follows a similar move to Manifest V3, so many of the same messages and fixes apply. Edge's extensions page is edge://extensions, and the puzzle icon works the same way. Edge can also install extensions from the Chrome Web Store if you turn on Allow extensions from other stores. Our guide to adding extensions to Edge covers the details.

Edge also has its own add-ons store with extensions reviewed by Microsoft. When an extension exists in both stores, either works; prefer whichever the developer lists on their own website. Extensions installed in Edge are separate from Chrome's, even on the same PC, and each browser syncs its own list to its own account.

Extensions on phones, tablets and Chromebooks

Chrome on Android and iPhone does not support extensions, so an extension you use on your PC will not appear on your phone, even with sync on. Many popular extensions have a companion mobile app instead, such as password managers and note tools. On Chromebooks, Chrome extensions work like on Windows and appear at chrome://extensions; school and work Chromebooks are usually managed, so extension choices may be set by the administrator.

On iPhone and iPad, some other browsers support their own extension systems, but those are separate from Chrome. If an extension's job is ad blocking on mobile, look at your phone's built-in content blocking options or a dedicated mobile app instead.

Chrome features that replace common extensions

Chrome now includes features that used to need an extension. Its built-in Password Manager stores and checks passwords; Reading mode in the side panel strips clutter from articles; tab groups organize tabs; Memory Saver frees memory from inactive tabs; Google Lens searches images on a page; and Translate handles foreign-language pages. Before replacing a dead extension, check whether Chrome already does the job; one less extension means one less thing to break, update or trust.

Built-in features also respect your existing settings and sync between devices, and they are updated with Chrome itself, so they never become "no longer supported". For example, if your old extension was a simple screenshot tool, Chrome's own screenshot option in the share menu, where available, may be all you need.

Too many extensions slowing Chrome

Every extension uses memory, and some run on every page you open. If Chrome is slow, open Task Manager inside Chrome with Shift + Esc; it lists each extension's memory and CPU use. Remove heavy extensions you rarely use, and set site access to On click for others so they only run when needed. Ten or fewer well-chosen extensions is a sensible target for most people.

If Chrome feels slow only on certain sites, try that site with extensions temporarily off: open an Incognito window, where extensions are off by default. If the site is fast there, one of your extensions is the cause, and turning them back on one at a time finds it.

Keyboard shortcuts for extensions

Open chrome://extensions/shortcuts to assign keys to extensions, such as Ctrl + Shift + L to open a password manager or Alt + S to save a page to a notes tool. Shortcuts work even when the extension's icon is unpinned, which keeps the toolbar clean. Choose combinations that do not clash with the websites you use most; if a shortcut stops working, another extension or Chrome itself may have claimed the same keys.

Some extensions also respond to commands typed into the address bar after a keyword, which you can see on the extension's details page. Combined with keyboard shortcuts, these let you use an extension without ever touching its icon.

Why a trusted extension can change

Extensions are software made by individuals and companies, and they change hands. A popular, honest extension can be sold to a new owner who adds tracking or ads in an update, which Chrome installs automatically. That is why permission prompts after updates, sudden new behavior and fresh negative reviews deserve attention. Google removes extensions it finds misbehaving, which is when you see the malware or policy messages above, but noticing early yourself is better. Preferring extensions from established developers with a clear business model, such as a paid tier, reduces the risk.

If you suspect an extension changed owners, its store page often shows a new developer name or website. Removing it and finding a replacement from a developer you trust is usually the safer choice than waiting to see what the next update brings.

Extension crashed or stopped responding

When an extension crashes, Chrome may show a notice, or the extension simply stops responding. Open chrome://extensions and click the circular Reload arrow on its card if shown, or switch it off and on. Repeated crashes after a Chrome update usually need an update from the developer; check its store page or website, and in the meantime turn it off so it does not slow other pages.

If an extension crashes only on one site, the site may have changed in a way the extension does not handle yet. Turning off the extension's access to that site, from the puzzle menu, keeps the rest of your browsing smooth until the developer releases a fix.

For IT admins: managing Chrome extensions

Policies. Use ExtensionSettings for a complete allow/block/force-install configuration per extension, with ExtensionInstallForcelist, ExtensionInstallBlocklist and ExtensionInstallAllowlist for simpler setups. Restrict risky permissions with blocked_permissions inside ExtensionSettings.

Manifest V2. The ExtensionManifestV2Availability policy no longer has any effect on current Chrome; inventory internal extensions and migrate them to Manifest V3. Chrome's enterprise reporting and the Admin console's app inventory show which extensions are installed where.

Review. Re-review force-installed extensions after ownership changes or major updates, and pin required ones with the toolbar pin settings in ExtensionSettings so users can find them.

Users. Communicate before blocking or replacing an extension people rely on; a short note explaining the change, and naming the approved replacement, prevents a flood of support tickets when icons disappear overnight.

Chrome extensions missing: frequently asked questions

Ethan's mother no longer thinks her browser was hacked. She now knows the three ordinary reasons an extension disappears: it was unpinned, it was an old Manifest V2 extension that Chrome switched off, or she was in the wrong window or profile. The Manifest V2 change was the biggest shift in Chrome extensions in a decade, and it caught many people out because the fix is not a setting but a replacement. Once that is clear, every missing extension is a two-minute job.

Revision note. Written October 2, 2026, rewriting our 2016 guide with the Manifest V2 shutdown and today's Chrome menus. May your favorite extensions always be one click away.