Greasemonkey is an add-on or plugin for your web browser "firefox" that allows us to install some scripts to improve our productivity on the sites that we visit.

How to use greasemonkey : Install Greasemonkey on firefox as an add-on .. then go to the web site with the thousands of custom scripts, find and install the one we want.

Greasefire is a companion extension to the popular Greasemonkey extension designed to help you customize your web browsing by finding user scripts for any page you're currently visiting.

1. Nighty Tester Tools - It fixes extension compatibility (makes them all work with the latest firefox version), and adds a few extras useful to those that regularly test nightly builds of Firefox, Thunderbird, Sunbird and Toolkit Seamonkey (umong other things).

2. Better GReader - This extension is for Google Reader, and it Compiles some of the best Greasemonkey user scripts and Stylish skins for Google Reader into one convenient interface.

Best Greasemonkey and Stylish scripts (both are Firefox extensions). How to modify the look of websites like gmail, google, google reader, last.fm, lyrics and other stuff to make youtube better and some other cool greasemonkey and stylish scripts.

How would you like to be able to customize the layout of the Google homepage? How about add better video controls and a download button to YouTube? Or set a profanity filter that works across all websites? Maybe remove all the “What type of leafy vegetable are you?” quizzes from Facebook? These are very few of the things that can be done with Greasemonkey.

Do you get frustrated and angry when a poorly designed website doesn’t load quick enough or is only partially visible? Well Greasemonkey, a free Firefox add-on, offers hundreds of free script to improve the functionality of websites and the net, whether its adding must-have features to Gmail, streamlining your social life in Facebook or speeding up your blog posts.

"Javascript getters and setters may be one of the most useful upcoming language features today (already working in some browsers, including Firefox), but google the feature and you will be swamped with articles and posts, not on how to put them to good use, but how to defend against malicious use of them for web pages tripping (Firefox / ditto extension) security holes.

GNUCitizen.org has discovered a way for malicious JAVA scripts to be hidden in a page that will be automatically extracted by Firefox’s JAVA reader. There is an easy fix if you install the NoScript Firefox extension, but this means that you’ll be running absolutely no scripts, making for a far more boring web browsing experience.

"Here is my notebook on how to create an extension for firefox. The following example was tested with firefox 2.0.0.11. This extension is used to insert a few default templates (such as Template:Infobox_scientist ) when editing a biography on Wikipedia. Infoboxes are used , for example by DBPedia, to create a structured version of wikipedia..."