Stratiform is the ultimate user friendly customization add-on for Firefox. It puts the power in the average user's hands to customize the browser's look.
Right-click on any link and scan the target with VirusTotal, scan your downloads with VirusTotal before storing them in your PC, free and easy. More information at: https://www.virustotal.com/documentation/browser-addons/mozilla-firefox/
Right-click on a link to instantly open it in Private Browsing mode. (Or right-click anywhere to quickly open private browsing mode.)
MailHops maps the route an email took to get to you. Displaying the senders location in the mail headers box. Click on the sender location to view a map of the mail route.
Keep your favorite Extensions synced with all your computers.
Watch Youtube videos in Cinema Mode! Remove clutter from Youtube and watch it off any noise and clutter as in cinema.
An addon for Firefox which enhances Google, Bing, Yahoo! and Yandex search with all their international flavours by adding previews (thumbnails) and additional functionality.
Facebook™ New Tab lets you visit your Favorite Facebook™ quickly when a new tab is opened.
Adds a Google +1 Button to your urlbar to +1 any page. More on http://www.google.com/+1/button/
Mozilla Firefox with Twitter instantly connects you with what's happening in the world. Search people and topics on Twitter using @ and # from the address bar.