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What are the steps to install a userscript for any of the major browsers? This question is for the benefit of those trying to get the minimal theme working. One browser per answer please.

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up vote 8 down vote accepted

Detailed instructions are available on the Stack Apps Site

How to install user scripts in Chrome

There are two methods for installing UserScripts in Chrome. The first is to install the TamperMonkey extension, which makes installation simple and easy. The second is to follow these instructions below:

Note: As of Chrome 35 (late May 2014), downloaded user scripts cannot be installed using the second method. Please use the TamperMonkey extension.

  1. Click on the link to the .user.js file found in the post
  2. Look for the confirmation at the bottom of your browser and click Continue.

    Are you sure you want to continue?

  3. Chrome will warn you that you can't install the script.Chrome warns: Extensions, apps and user scripts can only be added from the
  Chrome Web store.
    Because Google has disabled the direct installation of extensions that are not downloaded from their Web Store, you'll have to perform a few extra steps before you can use the script.

  4. The script should have appeared in your downloads bar.

  5. If the file name is modified to <filename>.user (<number>).js, rename the file so it ends with .user.js. Note: If file extensions are not displayed on your system, the name has to end with .user.
  6. Open the extensions manager. Go to Menu button > Tools > Extensions to open the extensions manager
  7. Drag drop the file from the downloads bar to the extensions page. If you had renamed it, drag-drop it from your file manager.
  8. Release the mouse if the text "Drop to install" appears.

  9. A dialog appears. Click Add to finish the installation. Confirm New Extension - click "Add" to install the script

  10. The script should now be installed. Refresh all tabs affected by the script to start using it.


How to install user scripts in Firefox

  1. Install the Greasemonkey add-on for Firefox if you haven't done so already
  2. Click on the link to the .user.js file found in the post.
  3. A Greasemonkey Installation dialog will appear. Review the sites on which this script will work on, view the source of the script if so desired and confirm that you wish to install the script

    Greasemonkey Installation dialog

  4. The script should now be installed. Refresh all tabs affected by the script to start using it.

How to install user scripts in Safari

GreaseKit (The hack approach, for Safari 4 and earlier)

  1. Download and Install SIMBL – (From the SIMBL website), SIMBL, pronounced like “symbol” or “cymbal” enables hacks. In other words, you can “patch” Mac applications to add functionality to them.
  2. Next, download GreaseKit. To install it, drag the GreaseKit.bundle file to ~/Library/Application Support/SIMBL/Plugins. If you don’t have a SIMBL/Plugins/ folder, just create it, then drop GreaseKit.bundle into it.
  3. Restart Safari, and you will see a new entry in the menu bar for “GreaseKit”.
  4. Click on the link to the .user.js file found in the post to install the userscript.
  5. The script should now be installed. Refresh all tabs affected by the script to start using it.

    from http://mosheberman.com/wordpress/?p=284

NinjaKit (a Safari 5 extension)

  1. Go to the NinjaKit homepage. The page is in Japanese, but don't worry—the install link is in English.
  2. Click on the "NinjaKit for Safari" link.
  3. If you are prompted to open or save the file, select open. If the file automatically downloads, find the downloaded file (NinjaKit.safariextz) and double-click it.
  4. When Safari pops up a message confirming you want to install NinkaKit, click install.

How to install user scripts in Opera 15 and newer versions

Install the TamperMonkey extension, which makes installation simple and easy.

How to install user scripts in Opera 12 and older versions

  1. Create a folder for userscripts. (eg, C:\Program Files\Opera Browser\Userscripts\ - it does not need to be within the Program Files folder, anywhere is fine.)
  2. Within Opera, go to Tools > Preferences.
  3. Click the Advanced tab.
  4. Click Content in the choices on the left.
  5. Click JavaScript options.
  6. For the "User JavaScript files", click Choose.
  7. Select the userscripts folder created in step 1. and click OK.
  8. Click on the link to the .user.js file and save it to the userscripts folder created in step 1.
  9. Refresh the tab(s) affected by the script to start using it.

    from http://www.howtogeek.com/howto/3986/set-up-user-scripts-in-opera-browser/

Development resources

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What content type should a web server use in to make the Safari version of the instructions work properly? It looks like just naming the file .user.js is not enough. –  dpk Dec 4 '11 at 18:13
    
I would guess application/javascript but I am not positive... Sounds like a good question for you to post @dpk! –  Josh Dec 4 '11 at 20:10
2  
In Chrome 21+ it’s not that easy anymore, sadly :( superuser.com/q/450893/3218 –  Mathias Bynens Jul 19 '12 at 11:40
    
This answer is outdated. In Opera 15+ you’ll need to install Tampermonkey to enable and manage user scripts. –  Mathias Bynens 2 days ago
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