Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
View mobile or desktop versions of sites, by impersonating other browsers' useragent headers.
URL Fixer fixes common typos in URLs entered in the address bar. It will fix errors like "google.con" or "youtube,com". You have the option of being asked to confirm corrections before they are applied.
This add-on gives you the ability to have your home button like in a desktop browser.
You can save from 1 to 4 links to open quickly with your new home button.
Generate a disposable, reusable and anonymous real mail address when you need it.
Add a "Clear History" button to the Firefox preferences.
Creates a subpage for clearing everything, history, passwords, or just site settings for small time durations. Also adds option to clear everything on shutdown (You'll need to add Quit Fennec in order to have a quit 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.