Up & Coming Extensions

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Clear Fields

Buttons that clear various fields (like the Address Field or the Search Field). Both toolbar buttons and in-field buttons available since version 4.

Rated 4 out of 5 stars (50)
2,734 users

Stopwatch

Simple stopwatch you can use to time stuff. Adds a "Stopwatch" entry in your Tools...

Rated 4 out of 5 stars (7)
1,517 users

Firebug Paint Events

View details of MozAfterPaint events, using Firebug.
Setting the preference dom.send_after_paint_to_content to true is required in order to capture the MozAfterPaint events.

Rated 5 out of 5 stars (4)
4,949 users

FILSH.net Plugin

Allows you to start video downloads via FILSH.net right out of your browser.

Rated 5 out of 5 stars (1)
2,739 users

Babylon Dictionary Word Search

Find the definition for a selected word in a web page or an email.
Right click over the selected word, choose the option "Search in Babylon" and that's it! You will have a new window with the definition of the selected word.

Rated 4 out of 5 stars (34)
4,972 users

SwiftTabs

Move to the next tab or the previous tab with a key.

Rated 5 out of 5 stars (40)
3,848 users

Firepicker

Simple color picker plugin for Firebug.

Rated 5 out of 5 stars (46)
25,316 users

PDF Search Engine and PDF Viewer Toolbar

Free PDF Search Engine and PDF Viewer Toolbar

Rated 4 out of 5 stars (6)
3,154 users

FlashGot Mass Downloader Featured

Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.

Rated 5 out of 5 stars (424)
1,365,633 users

Leet Key

Transforms typed or static text to L337, ROT13, BASE64, HEX, URL, BIN, DES, AES, Morse code, DVORAK keyboard layout and to lower/to upper case functionality, Leet Font...

Rated 4 out of 5 stars (46)
7,349 users

Siepomaga

Very simple extension, it opens once a day website 'http://siepomaga.pl/s/klikaj' in new tab.

Rated 5 out of 5 stars (9)
1,218 users

NoScript Security Suite Featured

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

Rated 5 out of 5 stars (1,292)
2,277,865 users

LinkChecker

Check the validity of links on any webpage.

Rated 4 out of 5 stars (73)
20,705 users

LocalLink

Open local URLs ("file://") from any webpage. Please see the extension homepage for explanations, the mailing list and the newsgroup where I am happy to answer questions. I am sorry that - based on past experience - I had to decide to...

Rated 5 out of 5 stars (8)
11,061 users

Delete Site History

The stock "Forget this site" in Firefox delete everything (including cookies, saved passwords, localStorage etc) of the selected website. This add-on add one context menu on history item and tab, that delete only history of the selected website.

Rated 4 out of 5 stars (13)
1,252 users

SkipScreen -- Great Multi-Host download helper!

Skips unnecessary pages on sites like Rapidshare, 4Shared, zShare, Mediafire, and more. Try it out, or watch a demo at http://www.skipscreen.com

Why click through ad-laden pages and wait for countdowns when your computer can do it for you

Rated 4 out of 5 stars (605)
265,639 users

PDF Plugin for Firefox on Mac OS X

Note from Mozilla: This add-on has been discontinued. Try PDF Viewer instead.

PDF plugin for Firefox 3 on Mac OS X. Displays PDF documents in the browser.

Rated 4 out of 5 stars (218)
20,992 users

Clipple

Clipple provides extended clipboard system to Firefox. All text you copied will be stored and you can paste text in it later.

Rated 4 out of 5 stars (42)
5,258 users

YouTube Bulk Player Mate

Select and play all the YouTube videos on the web page one by one, and continuously.

Rated 5 out of 5 stars (2)
3,848 users

Docs Online Viewer

Docs Online Viewer provides a convenient method to open online documents/files of any format (PDF, DOC, DOCX, XLS, PPT, RTF, ODT, ODP, CSV etc.) using Google Docs & Zoho Viewer directly in your browser eliminating the need of any additional plugins.

Rated 5 out of 5 stars (5)
3,271 users