The only secure way to handle multiple web service accounts without using the same password.
ShareMeNot is a Firefox add-on designed to prevent third-party buttons (such as the Facebook “Like” button or the Twitter “tweet” button) embedded by sites across the Internet from tracking you until you actually click on them.
This firefox extension will allow you to use google chrome extensions inside firefox.
allowing anyone who can build a Web site to participate in making Firefox addons
ShiftSpace (pronounced: §) is an open source browser plugin for collaboratively annotating, editing and shifting the web.
Faire l'expéreince de la censure chinoise d'internet grace à une extension firefox.
helps to make a screenshot of a whole page.
Full page screenshot with firefox