Install / Uninstall User Script on Google Chrome

[Important Update] Google Chrome version 21 had change the way how we can install user script. Now it only allow user script to be install in the Extensions page and not any page opened. For the latest tutorial on how to install / uninstall user script in Google Chrome visit here.



I decided to write a simple guide on how to install and uninstall user script on Google Chrome after many users keep on asking the same question. Sorry for not updating my blog for so long, I will try to free as much time as possible to keep my blog alive in this new coming year!

How to install user script on Google Chrome:

Step 1: Download the user script you want from website such as

  • If you want to download script from, right-click on the Install button and select Save link as…
  • Save to some places that easy to remember such as Desktop as you will need it very soon.

Step 2: Find the script you just download. Right-click on it and select Edit.

  • Notepad will be open and it will allow user to edit the script before use it.
  • Skip Step 2 if you do not wish to edit the script or you do not know how to edit the script.
  • Save and close notepad after finish editing.

Step 3: Open your Google Chrome and start a New Tab. Drag the script you download just now and drop to Google Chrome.

Step 4: Confirm the install of the user script by clicking on Continue at the botton of Google Chrome.

Step 5: Click on Install when a pop up ask you whatever you want to install the script or not.

Step 6: Done! The script will be install after you click on install. Refresh the page you want to apply the script to get immediate effect apply.

  • You can always check your installed script from Menu > Tools > Extensions.
  • If you want to edit the script to suit your personal preference, just repeat the Step 1 until Step 6 again (remember to read Step 2 in detail!).

How to uninstall user script on Google Chrome:

Step 1: Go to Menu > Tools > Extensions.

Step 2: Find the script you want to uninstall and click Uninstall.

Step 3: Confirm by click on Uninstall on the pop up dialog.

Step 4: Done!

Hope this post can help to save some trouble facing by the new users.

by Ooi Keng Siang via Ooiks’s Blog

54 thoughts on “Install / Uninstall User Script on Google Chrome

      1. Please mention this directly in the blog, that the filename must end in user.js. I had to waste a lot of time figuring out why the directions in the post didn’t work, then I had to read the comments.


  1. thanks.. but it often times doesn’t work.. especially the timer.. sometimes the timer is advance than the mousehunt timer and sometimes delayed for 1 or 2 min. but thanks by the way.. it helps a lot..


  2. Hi recently on my mac ive updated the recent update of chrome 11 and since, mousehunt tends not to be in sync with the timer.


    1. I had already mention this issue on MH AutoBot 1.19 post. Chrome has some problem on timer, even the mousehunt timer also did not display correctly. For temporary fix, enable aggressive mode or use other browser.


  3. hi, recently i’ve been getting this ‘No more cheese!’ message saying that i need to log in to mousehunt first. i encounter this when the script was running without iframe. its been very frequent, about once an hour. is there a way to avoid this hiccup?


  4. I dropped the script on google chrome but chrome say could not read source file. The script you saved has .user.js extension at the end of the filename. My chrome version 15 =X


  5. I think the script now on version 15 disables the installing userscript. ive compared this installing on version 14, sucessfully installed it


  6. Great script there. Just want to find out how I can change the king’s reward warning sound.

    I understand that the script probably directs to a midi file online, may I know which line of coding should I edit to change it?


  7. Hi, im using Google Chrome as my default browser. your MH bot is running well but there is no sound when i have kingreward. “True” marked. can help me? thanks a lot.


  8. I don’t get it. Why don’t you write:
    Step 1: Make sure your script has the extension .user.js
    Step 2: Drag the file over to chrome
    Step 3: Press continue to install

    Not a very good guide, if I have to read the comments to be able to install a script. When you donwload your script from sites such as pastebin, you get a .txt file, not a .user.js file. I had figured step 2 and 3 on my own, before I read the article. But it doesn’t work unless it has the right extension..


  9. hi, when i drag the file i downloaded. it only opens it on chrome like a notepad. there is no notification that shows that you can install it. having a hard time figuring this out right now. please help! thanks! 😀


  10. With the new Google Chrome update, doing your steps does not work anymore. You need to upload this script onto the Chrome Web Store for it to work.

    How do I go about using your script without chrome prompting to me that I can only use extensions via their web store?


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