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 20,543,420 users
- 2. Video DownloadHelper 4,463,754 users
- 3. NoScript Security Suite 2,230,114 users
- 4. Firebug 2,089,718 users
- 5. Easy Screenshot 2,050,820 users
- 6. Ghostery 1,480,927 users
- 7. DownThemAll! 1,295,115 users
- 8. Greasemonkey 1,271,763 users
- 9. Adblock Plus Pop-up Addon 1,127,949 users
- 10. Flash Video Downloader - YouTube HD Download [4K] 1,072,191 users
Featured Extensions See all »
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Customize the way a web page displays or behaves, by using small bits of JavaScript.This add-on is not compatible with your version of Firefox because of the following:
1,271,763 users -
Finally, an efficient blocker. Easy on CPU and memory.This add-on is not compatible with your version of Firefox because of the following:
1,009,788 users -
Reader is the ultimate Reader tool for Firefox.This add-on is not compatible with your version of Firefox because of the following:
34,603 users -
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.This add-on is not compatible with your version of Firefox because of the following:
Beta builds on versions page!38,925 users -
Play YouTube™ Videos in Flash or HTML5 PlayerThis add-on is not compatible with your version of Firefox because of the following:
43,672 users -
One click to clear your cache, cookies, history, html5/local storage, http logins, all of them or restart your browser with/without notifications.This add-on is not compatible with your version of Firefox because of the following:
29,534 users -
Alter Firefox's built-in privacy settings easily with a toolbar panel.This add-on is not compatible with your version of Firefox because of the following:
16,433 users -
Lightbeam is a Firefox add-on that enables you to see the first and third party sites you interact with on the Web. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit.
This add-on is not compatible with your version of Firefox because of the following:
524,018 users -
COMPLETELY REDESIGNED TRANSLATOR FOR FIREFOX
This add-on is not compatible with your version of Firefox because of the following:
ImTranslator translates text, words, webpages between more than 90 languages.
NEW: Inline Translator, Dictionary, access to Google Translate, Microsoft Translator. Unique on the fly localization.328,578 users -
Adds private tabs.
This add-on is not compatible with your version of Firefox because of the following:
71,885 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:
1,127,949 users -
Google™ Translator is a handy multi-language translator built on top of Google Translate. It gives you Google Translate UI feel right on your Firefox toolbar.
This add-on is not compatible with your version of Firefox because of the following:
83,134 users -
FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.
This add-on is not compatible with your version of Firefox because of the following:
34,494 users -
An addon to download files at specific time interval
This add-on is not compatible with your version of Firefox because of the following:
3,304 users -
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.
This add-on is not compatible with your version of Firefox because of the following:
114,763 users -
F.B. Purity hides the ads, app spam and other annoying clutter from your facebook news feed, lets you increase the font size, change colours plus many more features and generally makes Facebook a lot less annoying to use.
This add-on is not compatible with your version of Firefox because of the following:
45,045 users -
Protection from adult content (parental control) and from dangerous sites.
This add-on is not compatible with your version of Firefox because of the following:
Entrust protection for yourself and your children to professionals!30,150 users -
Block downloads, lock down bookmarks/addons/downloads with a password.
This add-on is not compatible with your version of Firefox because of the following:
201,506 users
Up & Coming Extensions See all »
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Toggle JavaScript engine on and off the easy wayThis add-on is not compatible with your version of Firefox because of the following:
11,584 users -
Generate a PDF from webpage. It is converting your webpage to PDF. It will convert all the contents of webpage which is not in visible area also. No Server processing.This add-on is not compatible with your version of Firefox because of the following:
8,707 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:
5,939 users -
Adds a new page that shows add-on memory usageThis add-on is not compatible with your version of Firefox because of the following:
1,784 users -
Gmail Mail Sidebar brings Gmail right into your Firefox Sidebar.This add-on is not compatible with your version of Firefox because of the following:
14,127 users -
Shows the Bookmarks Toolbar when mouse moves above Web Content.This add-on is not compatible with your version of Firefox because of the following:
1,374 users -
The most popular userscript manager for Blink-based browsers
This add-on is not compatible with your version of Firefox because of the following:
5,827 users -
Améliorez le design de Freebox OS grâce à Material Freebox OS !
This add-on is not compatible with your version of Firefox because of the following:
1,041 users -
Stopads , the new generation ad blocker allows you to navigate serenely on the web without intrusive ads ( pop up, siste under) or tracking.
This add-on is not compatible with your version of Firefox because of the following:
Stopads effectively blocks all types of advertising on any web pages .85,975 users -
Gesperrte YouTube-Videos ansehen.
This add-on is not compatible with your version of Firefox because of the following:
27,369 users -
Set proxy server with one click! Visit Cool-proxy.net, the best resource of proxy servers and set your browser with one click.
This add-on is not compatible with your version of Firefox because of the following:
1,065 users -
Adult Unblock VPN is number one tool for unblocking adult and any other web site!
This add-on is not compatible with your version of Firefox because of the following:
2,164 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:
1,028 users -
TubeBuddy is a browser extension built for YouTube creators that can save hours of time, help optimize videos, help engage with your audience and a whole lot more.
This add-on is not compatible with your version of Firefox because of the following:
1,490 users -
Youtube Unblock VPN is number one tool for unblocking youtube and any other web site!
This add-on is not compatible with your version of Firefox because of the following:
1,845 users -
WhatsApp™ Desktop provides an easy access to WhatsApp, and notifies you of incoming posts.
This add-on is not compatible with your version of Firefox because of the following:
136,302 users -
This Add-on sets your default Search to Yahoo, and it brings a fresh look to every new tab page, powered by Yahoo.
This add-on is not compatible with your version of Firefox because of the following:
15,121 users -
No need flash plugin on embeded youtube movies
This add-on is not compatible with your version of Firefox because of the following:
7,662 users
Featured Themes See all »
Featured Collections See all »
To create your own collections, you must have a Mozilla Add-ons account.
