Most Popular Extensions

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IE Tab + (FF 8+, 7, 6, 5, 4, 3.6, 3.5, SeaMonkey)

IE Tab + is an enhanced version of IE Tab. It supports FF 3.5 or greater, integrates IE Tab with Adblock Plus in the IE Tab engine, and synchronizes cookies between IE and Firefox. You can easily import settings from the original IE Tab into IE Tab +

Rated 3 out of 5 stars (86)
106,499 users

PDF Download

Use PDF Download to do whatever you like with PDF files on the Web. Regain control and eliminate browser problems, view PDFs directly in Firefox as HTML, and use the all-new Web-to-PDF toolbar to save and share Web pages as high-quality PDF files.

Rated 2 out of 5 stars (688)
105,171 users

X-notifier (for Gmail,Hotmail,Yahoo,AOL ...) Featured

Notifier for gmail, yahoo, hotmail, aol and more webmails.
X-notifier(aka WebMail Notifier) checks your webmail accounts and notifies the number of unread emails...
Supports : gmail, yahoo, hotmail, POP3/IMAP, facebook, twitter and more

Rated 4 out of 5 stars (1,663)
105,090 users

Gmail Notifier (restartless) No Restart Featured

Multiple account (or label) Gmail notifier (without storing passwords)

Rated 4 out of 5 stars (255)
102,795 users

Forecastfox Weather

Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.

Rated 4 out of 5 stars (1,038)
102,760 users

RequestPolicy

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

Rated 4 out of 5 stars (229)
102,607 users

Theme Font & Size Changer No Restart Featured

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.

Rated 5 out of 5 stars (170)
102,492 users

Ecosia — The search engine that plants trees! No Restart Featured

Ecosia is a search engine that donates 80% of its surplus income to planting trees. By searching with Ecosia you can help the environment for free.
This extension adds Ecosia.org as the default search engine to your Firefox. Give it a try!

Rated 5 out of 5 stars (139)
102,395 users

ImgLikeOpera

ImgLikeOpera allows load only the images that you want in Firefox browser. This extension is very useful for non broadband users...

Rated 4 out of 5 stars (358)
101,455 users

SkipScreen -- download helper, now for sale...

We’re sorry to say we can’t maintain Skipscreen anymore. We’d love to see someone carry on with it. If you’d like to buy Skipscreen, or otherwise find it a good home, please contact us at admin@worcesterllc.com.

Rated 4 out of 5 stars (631)
101,085 users

AdBlock Lite No Restart

Block ads seamlessly on popular websites

Rated 3 out of 5 stars (40)
100,768 users

Video WithOut Flash No Restart

Watch videos without flash

Rated 3 out of 5 stars (63)
100,511 users

Simple YouTube to MP3/MP4 Converter and Downloader No Restart

Download youtube videos as mp3/mp4/ogg/webm fast and easy! Adding mirrors everyday to decrease any downtime! We monitor comments and work to fix any problems as soon as possible!

Rated 4 out of 5 stars (29)
100,122 users

UnMHT No Restart

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 5 out of 5 stars (224)
98,066 users

FastestFox - Browse Faster

Save time by speeding up repetitive tasks. Get faster, parallelized downloads, see definitions, auto-load the next page, improve searching, and more. FastestFox will dramatically enhance your productivity!

Rated 4 out of 5 stars (487)
97,915 users

Saved Password Editor Featured

Adds the ability to create and edit entries in the password manager.

Rated 5 out of 5 stars (222)
96,796 users

HttpFox

An HTTP analyzer addon for Firefox

Rated 4 out of 5 stars (166)
96,735 users

All-in-One Gestures

This extension allows you to execute common commands using mouse gestures, rocker navigation, scroll wheel navigation and page...

Rated 4 out of 5 stars (429)
96,069 users

Gmail Manager

The original Gmail notifier for multiple accounts. Allows you to receive new mail notifications along with viewing account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.

Rated 4 out of 5 stars (1,345)
94,948 users

Tab Groups No Restart

Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch to a specific one.

Rated 5 out of 5 stars (181)
94,826 users