The z0r.it Extension for Firefox!
Download Extension: https://addons.mozilla.org/en-US/firefox/addon/z0rit-shortner/
Install the extension in Firefox by clicking the button Add to Firefox. When the extension is installed, you will find a button in the top right corner of Firefox. When you click it, the URL in your AddressBar will be taken and shrinked with http://www.z0r.it - the result will be placed in your clipboard!
Fork this repository into your account. Make your changes and then submit a Pull Request. We will add your code to this repository and to the Official Extension of z0r.it on the Mozilla AddOn Gallery!
To test your changes, download the AddOn-SDK following these instructions: https://developer.mozilla.org/en-US/Add-ons/SDK/Tutorials/Installation
(For ArchLinux: https://aur.archlinux.org/packages/addon-sdk/ )
Then use cfx run to test your changes and cfx xpi to package it and install in your browser!