Up & Coming Extensions

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OverbiteFF

Add legacy protocol support back to Firefox and SeaMonkey with OverbiteFF, which restores support for Gopher servers, plus CSO/ph searches, finger, whois and more! Cross-platform JavaScript runs anywhere Firefox does.

Rated 5 out of 5 stars (19)
4,167 users

Private Tab No Restart

Adds private tabs.

Rated 5 out of 5 stars (213)
71,885 users

rikaichan

Japanese to English/German/French/Russian dictionary. Just hover the mouse on top of a word, and a popup appears. Automatically de-inflects verbs and adjectives. Detailed kanji view...

Rated 5 out of 5 stars (92)
46,961 users

BBCodeXtra

BBCodeXtra is an extension, compatible with Mozilla FireFox and Seamonkey, which adds to the context menu new commands to insert BBCode/Html/XHtml codes in an easy and fast way...

Rated 5 out of 5 stars (61)
5,244 users

RC Print

Adds a "Print" option to the Right-Click context menu.

Rated 5 out of 5 stars (2)
1,279 users

Ebank2 Plugin

K&H e-bank és electra belépés és tranzakció aláírás bővítmény / K&H ebank and electra login and transaction singing extension

Rated 3 out of 5 stars (3)
39,376 users

Markdown Viewer

Markdown document viewer.
Allows to visualize formatted markdown documents in browser.

Rated 4 out of 5 stars (33)
9,123 users

FastPrevNext No Restart

Easily browse through sequenced URLs

Rated 4 out of 5 stars (10)
1,460 users

KeePass Helper

Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.

Rated 4 out of 5 stars (34)
4,545 users

ViewAbout

Enables access to various about: dialogs from the View menu.

Rated 4 out of 5 stars (15)
3,183 users

Rikaichan Japanese-English Dictionary File

This is a dictionary file add-on for the Rikaichan extension.

Rated 5 out of 5 stars (6)
40,374 users

StartupMaster No Restart

Asks for the master password at startup (fixes multiple password prompt)

Rated 4 out of 5 stars (219)
18,647 users

CustomizeGoogle

Note from Mozilla: This add-on has been discontinued. Try Google Minimalist instead.

CustomizeGoogle enhances Google by adding information and removing unwanted information.

Rated 4 out of 5 stars (371)
5,742 users

CSHelper

This extension packages versions of the CamStudio recorder application and the XVID Codec. It is primarily intended to be used with the screen capture feature of the Video DownloadHelper add-on, when on Windows.

Rated 3 out of 5 stars (16)
26,886 users

Bitdefender QuickScan

The quickest way to find out if your computer is infected!
Bitdefender QuickScan is a very fast antivirus scanner, able to determine in a matter of seconds if a system is infected with malware.
More on http://quickscan.bitdefender.com/faq

Rated 4 out of 5 stars (60)
85,916 users

AutoPager Fixed

AutoPager Fixed is a working version of AutoPager extension for Firefox 36+ (non-E10s mode) to autoload the next page(s) when you scroll pages.

ATTENTION: DISABLE THE ORIGINAL AUTOPAGER ADDON!

Rated 4 out of 5 stars (53)
12,019 users

PageTweak - Ad Blocker, Video Downloader, Translator... No Restart

The Ultimate Webpage Enhancer! Instantly add many tweaks to any webpage including: Ad block, flash block, video download, remove delays, tooltip translation, link checker, rounded corners, auto pagerize, and more. A must have for all web users.

Rated 3 out of 5 stars (23)
4,969 users

Session Manager No Restart

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

Rated 5 out of 5 stars (458)
283,207 users

Adblock Plus No Restart Featured

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4,802)
20,543,420 users

InspectorWidget

Adds toolbar button and context menus for invoking the DOM Inspector (DOMi) for either chrome or content elements.

Rated 5 out of 5 stars (7)
1,270 users