Up & Coming Extensions



Easily browse through sequenced URLs

Rated 4 out of 5 stars (10)
1,390 users

FxIF Requires Restart

View EXIF data in image properties

Rated 4 out of 5 stars (90)
33,424 users

HTML5 Loop Requires Restart

Loop HTML5 Video and Music.

Rated 2 out of 5 stars (16)
1,254 users

Sun Cult Requires Restart

Worldwide Sunrise, Sunset, Twilight, Moonrise and Moonset...

Rated 5 out of 5 stars (117)
4,081 users

MetaProducts Integration Requires Restart

Integrate MetaProducts software with Mozilla browsers. Download links and Web sites using Mass Downloader and Offline Explorer. Save Web pages as you see them for future reference with MetaProducts Inquiry.

Rated 4 out of 5 stars (5)
2,980 users


Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

Rated 5 out of 5 stars (664)
479,011 users

SmoothWheel Requires Restart

Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).

Rated 5 out of 5 stars (267)
34,933 users

WikiLook Requires Restart

Leading dictionary lookup add-on. Fast, light, open source tool that define words for you without need to open new tabs or windows. Wiktionary&Wikipedia.

Ctrl or Shift or Alt + RightMouseButton click. Now with thesaurus.

70+ languages supported!

Rated 4 out of 5 stars (157)
3,992 users


Fight back against advertising surveillance

Rated 5 out of 5 stars (9)
4,832 users

Open With Internet Explorer

Open With Internet Explorer sends pages from Mozilla Firefox to Internet Explorer.

Not yet rated
4,683 users

1-Click YouTube Video Download Requires Restart

The simplest YouTube Video Downloader for all YouTube Flash sites, period.

Rated 4 out of 5 stars (539)
648,019 users

RequestPolicy v0.5 Legacy Requires Restart

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 3 out of 5 stars (5)
1,511 users

Persona Switcher Requires Restart

Quickly switch between your personas or reset it back to the default via a menu or the keyboard. You can also automatically rotate through all of your themes on a time interval you select. Works for Firefox, Thunderbird, and Seamonkey.

Rated 5 out of 5 stars (49)
1,932 users

HabuL Requires Restart

Reports spam to the SpamCop, the FTC, FDA, SEC, ACMA and/or Knujon.com. It also allows you to put in your own custom addresses to report spam to such as your ISP or corporate abuse address.

Rated 4 out of 5 stars (32)
1,590 users

Easy Youtube Video Downloader Express

"#1 Rated Firefox Youtube Video Downloader", Only one with 1080p Full-HD and 256kbps MP3 Direct Links. A clean, fast and simple addon for superfast and easy downloads in FLV, 3GP, MP3, MP4, 720p, 1080p qualities on Youtube pages.

Rated 4 out of 5 stars (973)
299,866 users

Unsubscribe from Mailing List Requires Restart

Allows recipients to cancel their newsletter subscriptions in the thunderbird interface.

Rated 4 out of 5 stars (13)
1,213 users

Saved Password Editor Requires Restart

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

Rated 5 out of 5 stars (233)
89,223 users

Form History Control Requires Restart

Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller.

Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.

Control for which webpage form history is saved or not.

Rated 5 out of 5 stars (87)
24,158 users

Youtube Best Video Downloader 2 - MP3 MP4 M4A AAC

Now with 1080p Full-HD Support!

Download every YouTube video you want and you can download them as Full-HD MP4, FLV, 3GP, MP3, M4A and AAC formats. Easy & Fast!

Rated 3 out of 5 stars (50)
114,281 users

Free Memory Button

Free unused memory that Firefox is currently using.

Rated 4 out of 5 stars (6)
7,011 users