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).
Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...
FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.
Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.
View HTTP headers of a page and while browsing.
Allows URI texts written in webpages to be loaded by double clicks.
FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.
Show the IP address of the current page in the status bar. It also allows querying custom information services by IP (right click) and see location and avaiable vouchers for shopping sites. Additionally you can copy the IP address to the clipboard.
Offers the possibility to display documents in browser window.
Use identicons to automatically generate favicons for sites without one.
Periodically saves info on all of your open tabs to a TSV text file (window/tab index, URL and title of each tab), thus creating a searchable history of URL visits.
Collections are groups of related add-ons that anyone can create and share.Explore Collections