Lightbeam is a Firefox add-on that enables you to see the first and third party sites you interact with on the Web. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit.
View mobile or desktop versions of sites, by impersonating other browsers' useragent headers.
PDF.js brings Portable Document Format (PDF) reading capabilities to your browser using web standard technologies.
Please report issues to: https://github.com/mozilla/pdf.js/issues
This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.
Anything between simple tweaks such as placing the findbar in the top corner, to the powerful "Find in All Tabs" tool, FindBar Tweak will make your find toolbar "just right"!
Supercharge your reload button and hotkeys!
Provides the ability to block specific image requests easily.
A really generic user agent switcher, no restart required.
Install Browser Extensions straight from GitHub Repositories
Vertical Tabs for Firefox with a space-efficient native look & feel.
Adds a 'Copy HTML' context menu item which allows you to copy the HTML for the selected content.
Copy your profile to the sdcard for easy debugging.