Featured Extensions


User-Agent Switcher Featured

Quickly and easily switch between popular user-agent strings.

Rated 4 out of 5 stars (32)
58,348 users

Download YouTube Videos as MP4 Featured

An extension that adds direct links to download YouTube videos as MP4 and FLV. It has a simple interface and it downloads videos directly from YouTube. The extension integrates with YouTube's interface and adds a download button below the player.

Rated 4 out of 5 stars (430)
1,061,903 users

Google Privacy Requires Restart Featured

Make some popular websites respect your privacy settings.
Please see the known issues below!

Rated 5 out of 5 stars (32)
29,038 users

YouTube Anywhere Player Featured

Watch videos anywhere in cinema mode without leaving the website you're on.

Rated 5 out of 5 stars (64)
20,861 users

Smart HTTPS Featured

Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts it back to HTTP.

Rated 4 out of 5 stars (23)
40,081 users

Master Password+ Requires Restart Featured

Various enhancements for build-in "master password" (MP)
-Locks master security device on demand or after specified time
-Prompts for MP on browser startup
-Suppresses all or duplicate MP prompts
-Locks up entire application or individual windows

Rated 4 out of 5 stars (132)
23,847 users

Thumbnail Zoom Plus Requires Restart Featured

Shows full image when you hover over a thumbnail. Works with Amazon, Baidu Images, Bing Images, Facebook, Flickr, Google+, Google Images, IMDb, LinkedIn, Netflix, Pinterest, Reddit, Twitter, Yandex, YouTube, Wikipedia, Yahoo Images, & many more.

Rated 4 out of 5 stars (372)
106,485 users

Privacy Settings Featured

Alter Firefox's built-in privacy settings easily with a toolbar panel.

Rated 5 out of 5 stars (50)
18,162 users

Beyond Australis Featured

Australis was the code name for the current Firefox theme, it aimed to make a great browser look awesome. Now you can go one step further and also make it feel awesome to use!

Rated 5 out of 5 stars (306)
35,929 users

Tab Memory Usage Featured

Tab Memory Usage displays the amount of memory is used by each tab

Rated 4 out of 5 stars (33)
36,497 users

Pearltrees Featured

Pearltrees lets you organize all your interests.

Rated 5 out of 5 stars (245)
18,195 users

Google search link fix Featured

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.

Rated 5 out of 5 stars (138)
72,021 users

Nimbus Screen Capture - editable screenshots Featured

1) Screen capture web pages.
2) Selected regions.
3) Whole browser windows.
Edit screenshots and save the images to either local file or Google Drive. Annotate screenshots in a very user-friendly interface with different tools. Upload and share!

Rated 5 out of 5 stars (298)
129,758 users

Google Translate, ImTranslator, Dictionary, TTS Requires Restart Featured

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.

Rated 4 out of 5 stars (463)
326,334 users

Add-ons Manager Context Menu Requires Restart Featured

Add more items to Add-ons Manager context menu.

Rated 5 out of 5 stars (38)
49,587 users

Tab Scope Requires Restart Featured

Preview and navigate tab contents through popup.

Rated 4 out of 5 stars (475)
121,639 users

QR Code Image Generator Featured

Create a QR Code of the selected text or current URL. Use CTRL-SHIFT-Q to quickly see the QR Code. Also possible to create a QR Code from free text within Firefox. Works completely offline! Now with UTF8 support.

Rated 4 out of 5 stars (26)
17,486 users

Greasemonkey Requires Restart Featured

Customize the way a web page displays or behaves, by using small bits of JavaScript.

Rated 4 out of 5 stars (1,012)
1,220,085 users

Reader Featured

Reader is the ultimate Reader tool for Firefox.

Rated 5 out of 5 stars (60)
34,218 users

Public Fox Requires Restart Featured

Block downloads, lock down bookmarks/addons/downloads with a password.

Rated 4 out of 5 stars (194)
184,305 users