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:
- Click on the link to the
.user.jsfile found in the post Look for the confirmation at the bottom of your browser and click
Continue.
Chrome will warn you that you can't install the script.

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.The script should have appeared in your downloads bar. Open the folder to which the script was downloaded.

Leave this window open and go back to Chrome.
Open the extensions manager.

Switch to the file explorer window you just opened. Resize it so the extension manager is visible as well.
If the file name is modified to
<filename>.user (<number>).js, like in the example, 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.- Drag the script over the extension manager

Release the mouse if the text "Drop to install" appears.
A dialog appears. Click
Addto finish the installation.
The script should now be installed. Refresh all tabs affected by the script to start using it.
How to Install User Scripts in Firefox
- Install the Greasemonkey add-on for Firefox if you haven't done so already
- Click on the link to the
.user.jsfile found in the post. 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

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)
- 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.
- Next, download GreaseKit. To install it, drag the
GreaseKit.bundlefile to~/Library/Application Support/SIMBL/Plugins. If you don’t have aSIMBL/Plugins/folder, just create it, then dropGreaseKit.bundleinto it. - Restart Safari, and you will see a new entry in the menu bar for “GreaseKit”.
- Click on the link to the
.user.jsfile found in the post to install the userscript. The script should now be installed. Refresh all tabs affected by the script to start using it.
NinjaKit (a Safari 5 extension)
- Go to the NinjaKit homepage. The page is in Japanese, but don't worry—the install link is in English.
- Click on the "NinjaKit for Safari" link.
- 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. - When Safari pops up a message confirming you want to install NinkaKit, click install.
How to Install User Scripts in Opera
- 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.) - Within Opera, go to
Tools -> Preferences. - Click the
Advancedtab. - Click
Contentin the choices on the left. - Click
JavaScript options. - For the
User JavaScript files, clickChoose. - Select the userscripts folder created in step 1. and click
ok. - Click on the link to the
.user.jsfile and save it to the userscripts folder created in step 1. - 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/
How to Install User Scripts in Internet Explorer
- Download and install Trixie.
- Restart Internet Explorer.
- Click on the link to the
.user.jsfile and save it to Trixie's script folder. By default, this will beC:\Program Files\Bhelpuri\Trixie\Scripts. - In Internet Explorer, go to
Tools -> Trixie Options. - Click
Reload Scriptsand then clickOk.
Development resources
- UserScripts - a site to host Greasemonkey scripts.
- How to use jQuery in your scripts