WARNING
Most methods described here are outdated. Chrome no longer supports drag-and-drop script installation, NinjaKit (Safari) is discontinued, Trixie (IE) is defunct, and Opera’s native User JS support was removed. Use Tampermonkey or Violentmonkey instead.

Since userscript.org suddenly disappeared, a couple of years ago, and without a valid alternative on the horizon, I was creating (and maintaining) my little scripts only as Google Extensions (Shame on me).
In the last couple of weeks, I had the exigency of using one of my scripts for debugging on Safari and I took this chance to go through the use of User Scripts in different browsers.
The conversion is straightforward, you just need to add some config text at the top of your file, and it also gives you some handy features, for example, the possibility to add an updated URL where you can link directly to your script from its remote repository (Pretty handy, isn’t it?).
Installation on Chrome
- Download the user script.
- Open
chrome://chrome/extensions/. - Drag and drop the script file in the browser window.
Installation on other browsers
- You need an extension in order to use UserScripts in your browser, here are the most popular:
- Firefox: Install GreaseMonkey.
- Safari: Install NinjaKit.
- IE: Install Trixie.
- Opera: Follow the instructions located on Opera’s site: User JS.
- Import your script or install it by clicking on its link.
If you are curious to take a look at some UserScripts I have been working on lately, here we go: