Add-ons
To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseMost Popular All »
- 1. Adblock Plus 20,899,201 users
- 2. Video DownloadHelper 4,528,807 users
- 3. Easy Screenshot 2,592,468 users
- 4. Firebug 2,302,390 users
- 5. NoScript Security Suite 2,168,549 users
- 6. Ghostery 1,481,697 users
- 7. Greasemonkey 1,322,641 users
- 8. DownThemAll! 1,322,392 users
- 9. uBlock Origin 1,183,558 users
- 10. Adblock Plus Pop-up Addon 1,141,698 users
Featured Extensions See all »
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Add more items to Add-ons Manager context menu.This add-on is not compatible with your version of Firefox because of the following:
18,631 users -
A Torrent Client for Firefox and SeaMonkey, runs everywhere, created in pure JavaScript without binary software!This add-on is not compatible with your version of Firefox because of the following:
46,769 users -
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.This add-on is not compatible with your version of Firefox because of the following:
357,208 users -
Allows quick enable and disable of Java, Javascript, Cookies, Image Animations, Flash, Silverlight, Images, Stylesheets and Proxy from the Toolbar. This is great for increasing security or decreasing bandwidth.This add-on is not compatible with your version of Firefox because of the following:
282,787 users -
A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.This add-on is not compatible with your version of Firefox because of the following:
137,205 users -
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.This add-on is not compatible with your version of Firefox because of the following:
292,644 users -
Watch videos anywhere in cinema mode without leaving the website you're on.This add-on is not compatible with your version of Firefox because of the following:
25,326 users -
AdBlock for YouTube™ removes all annoying Ads from YouTube
This add-on is not compatible with your version of Firefox because of the following:
299,299 users -
Tired of having multiple tabs open just to view your favorite Google services and other Apps like Feedly, Evernote, Twitter and more? Now you can see them right from your Gmail Inbox.
This add-on is not compatible with your version of Firefox because of the following:
Install now or visit www.integratedinbox.com for more info.13,690 users -
— Open web pages saved with Internet Explorer or other browsers (MHT)
This add-on is not compatible with your version of Firefox because of the following:
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!175,836 users -
Google™ Translator Lite
This add-on is not compatible with your version of Firefox because of the following:
51,534 users -
DuckDuckGo is the search engine that doesn't track you. We also have smarter answers and less clutter. This extension makes DuckDuckGo available in the address bar, search bar and right-click menu. Also adds a handy toolbar button with more features!
This add-on is not compatible with your version of Firefox because of the following:
127,092 users -
Integrates location bar and search bar into one. Shows search and url suggestions. Quickly switch search engine using search keywords. Provides different auto-complete popup styles for compact displays.
This add-on is not compatible with your version of Firefox because of the following:
42,144 users -
FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.
This add-on is not compatible with your version of Firefox because of the following:
Check out my new project, FireSSH!511,633 users -
Play all videos on youtube without flash in your preferred size using only HTML5.
This add-on is not compatible with your version of Firefox because of the following:
117,370 users -
This extension prevents Google and Yandex search pages from modifying search result links when you click them. This is useful when copying links but it also helps privacy by preventing the search engines from recording your clicks.
This add-on is not compatible with your version of Firefox because of the following:
71,292 users -
Adblock Plus Pop-up Addon extends the blocking functionality of Adblock Plus to those annoying pop-up windows that open on mouse clicks and other user actions.
This add-on is not compatible with your version of Firefox because of the following:
1,141,698 users -
Easily download most popular video formats.
This add-on is not compatible with your version of Firefox because of the following:
50,480 users
Up & Coming Extensions See all »
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Unblock any blocked website in your country, school or company. SetupVPN changes your IP address and location with just single click! It's free and easy to use. Setup your VPN now.This add-on is not compatible with your version of Firefox because of the following:
1,314 users -
![Icon for Grammalecte [fr]](https://web-archive.nli.org.il/National_Library/20160526010038im_/https://addons.cdn.mozilla.net/user-media/addon_icons/701/701168-32.png?modified=1464193216)
French grammar checker.This add-on is not compatible with your version of Firefox because of the following:
2,075 users -
Convert any webpage to a pdf quicklyThis add-on is not compatible with your version of Firefox because of the following:
11,738 users -
Stop YouTube from Playing next tracks (aka disable autoplay button).This add-on is not compatible with your version of Firefox because of the following:
1,771 users -
Easy to use youtube video to mp3 downloaderThis add-on is not compatible with your version of Firefox because of the following:
17,475 users -
YouTube Video Download and Convert is the powerful add-on that lets you collect all media information available on YouTube. Advanced power panel lets you download, preview, play with and convert all media right inside Firefox.This add-on is not compatible with your version of Firefox because of the following:
51,340 users -
Rozszerzenie powiadamiające o aktywności PompaTeam & Friends
This add-on is not compatible with your version of Firefox because of the following:
1,432 users -
Prevent boring messages like "disable AdBlock and refresh page to continue"
This add-on is not compatible with your version of Firefox because of the following:
4,601 users -
Это дополнение позволяет синхронизировать ваш плейлист в соцсети ВКонтакте с любой вашей папкой на диске.
This add-on is not compatible with your version of Firefox because of the following:
2,417 users -
Use one of hundreds of unique new tab page experiences brought to you by Brand Thunder.
This add-on is not compatible with your version of Firefox because of the following:
1,666 users -
With Cartt you'll get the best offers while shopping.
This add-on is not compatible with your version of Firefox because of the following:
3,292 users -
跨平台、跨浏览器、跨网站，一个软件、一个账号，就可以去吐槽全球；无视删帖、关闭评论；槽友互踩互赞、相互喷翔，热闹非凡；内容加密，防脱裤，安全可靠，拒绝查水表.业界良心，尊重用心隐私，绝不收集敏感数据。
This add-on is not compatible with your version of Firefox because of the following:
5,584 users -
Block/Allow images by pressing user-defined hotkeys or a toggle button.
This add-on is not compatible with your version of Firefox because of the following:
8,813 users -
View HTTP headers of a page and while browsing.
This add-on is not compatible with your version of Firefox because of the following:
This is an unofficial "Live HTTP headers" clone, mainly to fix the Replay feature!1,149 users -
Add a custom useragent string for desired URLs or domains.
This add-on is not compatible with your version of Firefox because of the following:
4,177 users -
This extension notifies you when new messages arrive in your Office 365 mailbox.
This add-on is not compatible with your version of Firefox because of the following:
990 users -
Open With Adobe Illustrator is a new companion for web designers, graphic designers and in general whom like to use Illustrator.
This add-on is not compatible with your version of Firefox because of the following:
1,243 users -
Manage site-specific zoom levels and color settings
This add-on is not compatible with your version of Firefox because of the following:
1,302 users
Featured Themes See all »
Featured Collections See all »
To create your own collections, you must have a Mozilla Add-ons account.
