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VKontakte.ru Downloader (music/videos/photos @ VK)

Download music, videos and photos from VK.com / vkontakte.ru. One-click download, natural filenames, displaying file size and bitrate for music, downloading HD video, downloading HQ photos. No spam, no usage of your account, no spyware.

Rated 5 out of 5 stars (300)
19,701 weekly downloads

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

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 (1,407)
7,419 weekly downloads

FB Phishing Protector No Restart

Protects you from Phishing or Scams (through XSS injection attacks) while you're on Facebook™ - Version 4.2 introduces a Tracking Protection feature as well.

Rated 5 out of 5 stars (16)
6,952 weekly downloads

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 (1,131)
5,325 weekly downloads

ALLYouTubeDownloader

ALLYouTubeDownloader extention (FLV/MP4/WebM; HD/HQ). Windows only. Works only with ALL YouTube Downloader 2.3 application or higher (versions 2.2 and lower doesn't work anymore).
Homepage: http://www.allplayer.org/youtube-to-allplayer

Rated 3 out of 5 stars (7)
3,501 weekly downloads

Zindus

Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)

Rated 4 out of 5 stars (196)
1,264 weekly downloads

Yahoo! Mail Notifier

This extension notifies you when new messages arrive in your Yahoo mailbox.

NOTE: If you are having issues with the add-on reporting connection errors, try updating to version 1.0.7.3.

Rated 4 out of 5 stars (140)
1,003 weekly downloads

FoxTrick No Restart

Firefox extension for the popular Hattrick.org online football game.

It takes time for Mozilla to review updates thus this version might be out of date sometimes. The latest stable release can always be found on https://www.foxtrick.org/download

Rated 5 out of 5 stars (51)
948 weekly downloads

YouTube Videos Download in one click

Download YouTube videos by clicking a button underneath videos in YouTube. Save YouTube videos and songs in 1080p (HD) MP4 or FLV format.

Rated 3 out of 5 stars (16)
586 weekly downloads

Webmaster SAPE

Toolbar contains a set of functions, which expands the abilities of webmasters and optimizers, when working in the interface of SAPE exchange.

Rated 5 out of 5 stars (140)
553 weekly downloads

Galaxytoolbar

A Firefox extension for the OGame Galaxytool to keep it up-to-date.

Rated 4 out of 5 stars (12)
328 weekly downloads

GitHub Extension Installer No Restart

Install Browser Extensions straight from GitHub Repositories

Rated 5 out of 5 stars (4)
265 weekly downloads

Fire.fm

Enables direct Last.fm radio streaming to paid Last.fm subscribers. Discover new music and artists while listening to the music you love!

Rated 5 out of 5 stars (377)
241 weekly downloads

FB Gamer

Play FB's Games in full-window (no adverts, etc), please check full description below/details page.

Rated 4 out of 5 stars (5)
113 weekly downloads

WOT Play Replay

Данное приложение расширяет возможности сайта wotreplays.ru

Rated 5 out of 5 stars (1)
70 weekly downloads

Orkut Toolbar

Orkut Toolbar helps you to format the text of your posts in the Orkut forums, easily access all common functions of orkut, create and manage custom signatures and insert and view images and flash movies in orkut posts and scraps.

Rated 4 out of 5 stars (22)
54 weekly downloads

Gfire WebGame Detection Plugin

This extension tells Xfire and Gfire about the webgame you currently play.

Rated 4 out of 5 stars (1)
38 weekly downloads

DSLR Notifier 2 No Restart

Updated version of the original DSLR Notifier, created by Ryan Flint, which enables members of Dsl/Broadbandreports.com to keep tabs on their instant messages and updated...

Rated 5 out of 5 stars (9)
33 weekly downloads

ActiveInbox for Gmail

Effortless Email Management: prioritize and track important emails, move projects forward and do emails faster.

(Gmail plugin for tasks, projects, inbox zero, gmail folders, GTD and more)

Rated 4 out of 5 stars (136)
32 weekly downloads

Forecastbar Enhanced

Note from Mozilla: This add-on has been discontinued. Try Forecastfox Weather instead.

Get international weather and weather forecasts with Forecastbar Enhanced.

Rated 4 out of 5 stars (151)
31 weekly downloads