Quickly switch among sidebars, and view dialog windows for downloads and extensions.
Display international weather from AccuWeather.com via Firefox.
Add menus and a toolbars with various web developer tools to Firefox.
Create disposable email addresses, phone numbers, and credit cards.
Browse faster by speeding up common tasks.
Open, download, or view Adobe Acrobat files as PDF or HTML files in your browser.
Organize your schedule in a calendar that's fully integrated with your Thunderbird email.
Save your Firefox sessions and restore the state of all windows.
Check out this lightweight RSS and Atom feed aggregator extension for Mozilla Firefox.
Remove Timeline from Facebook with this Firefox add-on.