I installed this extension on Chrome.

I want to uninstall it, but I can't seem to find it on the extensions page.
Note that in Chrome app market, the app shows the installation button as available, but when clicked I see this error: An error has occurred - This item is already being downloaded and added into Chrome.

I tried restarting Chrome but that didn't help.
Is there a way to remove the extension via Windows Explorer etc.

  • I have the same problem and i cannot even install extensions on a fresh profile, the chrome store always says "installation is not enabled". Possibly it started with a update from 55.0.2883.75-3 to 55.0.2883.75-6 (debian) – allo Feb 7 '17 at 8:53
  • 1
    @allo – This is Debian bug 852398. Launching with chromium --enable-remote-extensions worked for me just now (using chromium 57.0.2987.98-1), but others haven't been able to get it working (see bug link). – Adam Katz Mar 15 '17 at 22:19

Okey. I find solution.

  1. If you login in Chrome -> logout.
  2. Go to %LocalAppData%\Google\Chrome\User Data\Default\Extensions and delete extension folder
  3. Go to %LocalAppData%\Google\Chrome\User Data\Default\Local Extension Settings and delete extension folder
  4. Restart Chrome
  5. Sign in
  6. ...Done!
  • Any idea where the data folders are in Mac OS X? – Vince Kronlein Jun 29 '15 at 17:41
  • On OS X, it's in ~/Library/Application Support/Google/Chrome/. On Linux, both directories live in ~/.config/google-chrome/Default/ (or, if you use chromium, ~/.config/chromium/Default). See also Where is the Chrome settings file? – Adam Katz Mar 15 '17 at 21:39
  1. Enter chrome://flags/ into your address bar
  2. Change Enable Enhanced Bookmarks to disabled
  3. Click Relaunch Chrome button at the bottom

You should now be able to install the extension again

  • 3
    For me it was called "Managed bookmarks for supervised users" but I enabled that and it worked like a charm. Thanks – neXus Jun 27 '16 at 19:06
  • Enabling "Managed bookmarks for supervised users" worked for me too! Thanks! – BrunoSerrano Jun 30 '17 at 16:33
  • 1
    "Managed bookmarks for supervised users" did not work for me – JinSnow Jun 30 '17 at 16:34

If you're sure that the extension doesn't show up in Settings>Extensions:

The default location for all Chrome extensions is

C:\Users\<username>\AppData\Local\Google\Chrome\User Data\Default\Extensions

When you navigate there, you'll find that all the folder names are cryptic, so you'll have to isolate the particular extension either by Date Modified, or by clicking in each folder and comparing the version number to the version number of the extension (find via the extension's page on Chrome Store).

To remove the extension just delete the particular folder, and restart Chrome.

  • 1
    Nops. I erased the folder and restarted Chrome, but the issue still persists. – Shimmy Nov 5 '14 at 7:15
  • @Shimmy What issue still persists? Do you mean that you can't install it again? Are you sure you deleted the right folder? – Rsya Studios Nov 5 '14 at 7:49
  • I copied the part of the app ID from its address on the store, searched for the folder at the path in your answer, closed erased that folder, restarted Chrome, and I'm facing the same issue described in the answer. – Shimmy Nov 6 '14 at 7:08
  • @Shimmy So the dialogue box still says: This item is already being added into Chrome? Check if it is still listed in chrome://extensions. Delete your cache and other settings support.google.com/chrome/answer/95582 and if that doesn't work, reset the browser settings support.google.com/chrome/answer/3296214 – Rsya Studios Nov 6 '14 at 7:29

This looks like running chrome process is in some messed up state.

Windows Solution Go to 'Task Manager' & kill all 'chrome.exe' process by clicking 'End Process'

Unix based platform Find list of process ids for chrome using 'ps -eaf' & use 'kill -9' to use kill those process.

This will close active window. So, restart chrome. Hopefully, problem solved.

  • OP: "I tried restarting Chrome but that didn't help." – Ƭᴇcʜιᴇ007 Jul 3 '16 at 14:59

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