Firefox extension that displays relevant Wikipedia articles alongside your Google search results.
Utility that displays the details of all browser add-ons/plugins installed on your system.
Open Youtube videos on the same page you are on.

Add-on for Firefox that allows you to post to Twitter through the bar in the browser.
Browser developed with a complete focus on user privacy, offering a secure and intuitive browsing experience.
Change the navigation colors in Google Chrome and make reading more pleasant for the eyes.