• Adblock Plus – Ever been annoyed by all those ads and banners on the internet that often take longer to download than everything else on the page? Install Adblock Plus now and get rid of them.
• NoScript – 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. your home-banking web site.
• IE Tab – Embedding Internet Explorer in tabs of Mozilla/Firefox. This is a great tool for web developers, since you can easily see how your webpage displayed in IE with just one click and then switch back to Firefox.
• Fasterfox – Fasterfox allows you to tweak many network and rendering settings such as simultaneous connections, pipelining, cache, DNS cache, and initial paint delay.
• Greasemonkey – Allows you to customize the way a webpage displays using small bits of JavaScript.
• Cooliris Previews – Cooliris Previews for Firefox gives you the power to browse faster and send links instantly.
• Tab Mix Plus – Tab Mix Plus enhances Firefox’s tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager with crash recovery that can save and restore combinations of opened tabs and windows.
• PDF Download – Allows to choose if you want to view a PDF file inside the browser (as PDF or HTML), if you want to view it outside Firefox with your default or custom PDF reader, or if you want to download it!
• Gspace – This extension allows you to use your Gmail Space (2.8 GB and growing) for file storage. It acts as an online drive, so you can upload files from your hard drive and access them from every Internet capable system.
• BlueOrganizer – The blueorganizer is smart browsing and personalization technology for Firefox. It makes the browser aware of everyday objects like books, movies, wines, restaurants and much more. The blueorganizer helps you automatically collect these object from many popular sites, manage them and instantly find related information.

NoScript – 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. your home-banking web site.

Fasterfox – Fasterfox allows you to tweak many network and rendering settings such as simultaneous connections, pipelining, cache, DNS cache, and initial paint delay.

Cooliris Previews – Cooliris Previews for Firefox gives you the power to browse faster and send links instantly.

Torbutton – Torbutton provides a button to easily enable or disable the browser’s use of Tor.

Flashblock – 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 it.

FoxyProxy – FoxyProxy is an advanced proxy management tool that completely replaces Firefox’s proxy configuration.

SwitchProxy Tool – SwitchProxy lets you manage and switch between multiple proxy configurations
quickly and easily. You can also use it as an anonymizer to protect your
computer from prying eyes.

iMacros – Automate your web browser. Record and replay repetitious work.

Firefox Extension Backup Extension – FEBE allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up – it will actually rebuild your extensions individually into installable .xpi files. Now you can easily synchronize your office and home browsers.

• Gspace – This extension allows you to use your Gmail Space (2.8 GB and growing) for file storage. It acts as an online drive, so you can upload files from your hard drive and access them from every Internet capable system.
• All-in-One Sidebar – All-in-One Sidebar (AiOS) is a sidebar control, inspired by Opera’s. Click on the left edge of your browser window to open the sidebar and get easy access to all your panels. It lets you quickly switch between sidebar panels, view dialog windows such as downloads, extensions, and more in the sidebar, or view source or websites in the sidebar.
• Dictionary Tooltip – Press ctrl+shift+D (or) double-click (or) right-click after selecting a word to see its meaning. This extension is ideal for those who doesn’t like to switch their window to see the meaning of a word.
• FireFoxMenuButtons – Adds 41 new Buttons (duplicating of menu strings) from Firefox Menu on the Toolbar! Look for this buttons (after installing) on the “Customize toolbar” (Menu/View/Toolbars/Customize…).
• Public Fox – Tired of cleaning stuff people download? Use this to limit file downloading. Prevent browser changes, block unwanted Web Sites.
• Firefox Google Bookmarks – Creates a menu to access google bookmarks from any computer. Needs Google Account to use this extension.
• Personal Menu – Feel tired of the conservative menus, and have tried to put them into a single menu but never want to waste time on one more click?
• Full Fullscreen – Hides remaining toolbars that the normal fullscreen functionality does not. Hiding the tab bar, as well as starting up on fullscreen, are configurable from the settings dialog. Licensed under MPL.
• gladder – Get over Great Firewall with Great Ladder!
• R-kiosk – Real Kiosk is a Firefox 2.0 extension that defaults to full screen, disables all menus, toolbars, key commands and right button menus. Alt+Home still takes you home.