Greasemonkey is an add-on for Firefox that allows you to apply javascript code to power-up and modify the functionalities of your favorite web browser. Nowadays, the use of javascript is something very usual when surfing the web, but GreaseMonkey goes one step further and uses javascript to modify full pages, add functions, modify font,... Greasemonkey lets you install userscripts - pieces of javascript code-, so it's even better than common add-ons because you can create your own add-ons by using javascript. If you feel creative today or if you have downloaded some useful javascript you think to useful on any website, you can apply it by using GreaseMonkey and enjoy the Internet on your way. Where can I find userscripts? You can find a list of usercripts here
