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).
The first and only download manager/accelerator built inside Firefox!
The Web Developer extension adds various web developer tools to the browser.
Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!
When you find something on the web that you want to view later, put it in Pocket. It automatically syncs to your phone, tablet or computer so you can view it at any time, even without an internet connection.
Tired of going to History -> Recently Closed Tabs just to undo a closed tab? Then this extension is for you!
This extension allows you to undo closed tabs via a toolbar button or the right-click context menu.
Signatures for Gmail, Google Mail, Yahoo Mail
Allows you to hide almost anything via context menu 'Remove Object'.
Add useful extra features to Gmail, like hierarchical labels, an unread message icon on your browser tab, file attachment icons, and more.
Add a compact menu button to the navigation toolbar, and hide the menu bar.
Display Wolfram Alpha results in Google searches.
No need to switch search engines when you can use both at once!
An extension that allows for the use of dynamic commands in Firefox.
Easy shrink any long URL or link in the page to something you can email or Twitter using the TinyUrl service with a single click in your browser.
Collections are groups of related add-ons that anyone can create and share.Explore Collections