NoScript - Firefox Add-on - Winner of the "2006 PC World World Class Award", this tool provides extra protection to your Firefox.
It allows JavaScript, Java and other executable content to run only from trusted domains of your choice, e.g
Github Shortcuts - Use your keyboard to navigate around Github. Adds a few global navigation shortcuts, like gh to go to your dashboard, or gn to go to navigation. All shortcuts start with g:
• gh - Go do your dashboard.
• gn - Go to your notifications.
• gi - Go to your inbox.
• gy - Go to your recent actions
Event Spy adds a context menu item to nodes in DOM Inspector's tree view that allows you to watch events that pass by the selected node. Event Spy provides output similar to that of Firebug's Log Events feature. But Event Spy does a little more: it lets you choose the specific events you want to watch
tuit.in URL shortener - This is the tuit.in URL shortener add-on. With this add-on you can shorten your URL without leaving the current page.
All your URL's shortened with the tuit.in add-on will be tracked by tuit.in analytics solution to give you advanced statistics such as number of clicks, location, and more
MobileDNT - 'Do Not Track' adds a visible preference toggle in Mobile Firefox for Do Not Track header support. More information about Do Not Track support in Firefox, can be read at dnt.mozilla
Status Watch - Firefox Addon - On complex websites with many assets missing files (or URLs with errors) can go unnoticed easily. This is a simple jetpack that watches HTTP traffic for any responses with 4xx or 5xx response codes and shows a brief notification to warn the user.
To use the whitelist, add a string named "extensions.statuswatch
Link Widgets - Firefox Addon - Eases navigation within sequences of pages (e.g. Web comics, forums, or technical specifications such as the HTML 4 Recommendation) by providing toolbar buttons for the first, previous, next, and last page
