Add-ons
To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
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Choose from thousands of extra features and styles to make Firefox your own.
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Multifox
This add-on is not compatible with your version of Firefox because of the following:
An extension that allows Firefox to connect to websites using different user names. Simultaneously.
*** Multifox 2 users: try the "Window Mode" (Addons - Multifox - Options) ***76,382 users -
Theme Font & Size Changer
This add-on is not compatible with your version of Firefox because of the following:
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
100,938 users -
S3.Google Translator
This add-on is not compatible with your version of Firefox because of the following:
S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.
New Feature: Language learning!372,258 users
Most Popular See all »
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With this addon you can translate any text to your own language with one click or hot-key. You can either translate the selected text, this way the translated text will overwrite the original selected text, or you can translate the full page too.This add-on is not compatible with your version of Firefox because of the following:
780,466 users -
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.This add-on is not compatible with your version of Firefox because of the following:
732,105 users -
S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!This add-on is not compatible with your version of Firefox because of the following:
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.
New Feature: Language learning!372,258 users -
Use the Evernote Web Clipper to save things you see on the web into your Evernote account.This add-on is not compatible with your version of Firefox because of the following:
359,946 users -
COMPLETELY REDESIGNED TRANSLATOR FOR FIREFOXThis 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.327,278 users -
YouTube Flash Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player.This add-on is not compatible with your version of Firefox because of the following:
283,900 users
Top Rated See all »
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Pearltrees lets you organize all your interests.This add-on is not compatible with your version of Firefox because of the following:
18,611 users -
YouTube Flash Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player.
This add-on is not compatible with your version of Firefox because of the following:
283,900 users -
Removes the checks WhatsApp put in place to disable Firefox accessing WhatsApp Web, the new web interface.This add-on is not compatible with your version of Firefox because of the following:
**NOTICE: WhatsApp Web is now compatible with Firefox! You don't need to install this addon any more**4,340 users -
A free extension of the web tools https://emojikeyboard.org & https://coolsymbol.com. It helps input emoji in the browser with an extensive search functionality to facilitate getting emoji by keywords - Sponsored by https://charactercounttool.com.This add-on is not compatible with your version of Firefox because of the following:
16,380 users -
Share Button for Facebook™ lets you share any web page on your Facebook™ Timeline by a quick button.This add-on is not compatible with your version of Firefox because of the following:
10,268 users -
An extension to silently generate a TinyURL for your current page at the click of a button. Also shows you where TinyURLs on the web will take you.
This add-on is not compatible with your version of Firefox because of the following:
18,589 users
Recently Added See all »
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Capture full-screen or specific application's screenThis add-on is not compatible with your version of Firefox because of the following:
0 users -
Social Share
This add-on is not compatible with your version of Firefox because of the following:
0 users -
1. Install ExtensionThis add-on is not compatible with your version of Firefox because of the following:
2. Play youtube video in your browser
3. Click the KV icon then click respective links to download
The most popular Keepvid.site website's Youtube Video Download Extension7 users -
This is a addon that help user to preview YouTube suggested videos without opening the video page,This add-on is not compatible with your version of Firefox because of the following:
Pop Window appears on hover for 2 sec over the video thumbnail. User can drag and close the addon on need. The video loads on all YouTube page.1 user -
Shorten your long URL. LIFE IS TOO SHORT TO REMEMBER LONG URLThis add-on is not compatible with your version of Firefox because of the following:
0 users -
Allows to share your entire screen or a specific window in Skyroom application.This add-on is not compatible with your version of Firefox because of the following:
1 user
See all 3286 extensions in Social & Communication »
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