View your Scratchpad content as an HTML page!
If you are using Console2, beginning Firefox 28, using -jsconsole on the command line will no longer open Console2 but instead opens FF's Browser Console. This addon allows dinosaurs like me to open Console2 by using -jsconsole2 on the command line.
Track your GitHub repos and issues from within Firefox!
A Firefox add-on with tweaks that allow better integration between Github and bugzilla.mozilla.org.