Add-ons

Live HTTP Headers by Daniel Savard, Nikolas Co

View HTTP headers of a page and while browsing.

Notepad (QuickFox) by InBasic, J Benthum

Everyday note-taking solution.

Toolbar Buttons by Button Guy

Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.

Copy Urls Expert by Kashif Iqbal Khan

Copy multiple urls (links) to clipboard. Provides options to copy urls of all opened tabs and urls in selected text. You can customize the format of copied urls. You can also open multiple links from clipboard.

Custom Buttons by Yan, cubegm, others

Gives a possibility to create custom toolbarbuttons...

AutoPager by Wind Li

AutoPager automatically loads next pages when you reach the end of a page. It works on a ton of sites,Google,Yahoo..
It works well with most other add-ons adblock plus, WOT and most of the greasemonkey scripts.
You can also try AutoPagerLite.

Browser Backgrounds by Baris Derin

Browser Backgrounds is the new Firefox extension that lets you install backgrounds directly on your browser.

Bitdefender QuickScan by BitDefender Labs

The quickest way to find out if your computer is infected!
Bitdefender QuickScan is a very fast antivirus scanner, able to determine in a matter of seconds if a system is infected with malware.
More on http://quickscan.bitdefender.com/faq

Extension List Dumper by Sogame

This extension adds a button ("Dump list") to the Add-ons window. When this button is pressed, a new window is opened with the list of installed extensions, themes or plugins...

FfChrome by Shivanand Sharma

FfChrome is a nifty little addon that slims and trims your context menu on the fly for simplicity, ease of use, easy access and eliminates the clutter. One addon that makes your day-to-day life easier by increasing productivity.

Leopardateam by Krislay

DARK STEEL FOX by aku666

Man Of Steel - Superman by T-tech2

London73 by lest73

Silver Scroll on Black Damask by MaDonna by MaDonna