Adds a small and simple button to YouTube videos that allows you to quickly download the audio of the video as an MP3 file (quality of the MP3 is as high as the video offers) without having to leave the page.
Zindus Requires Restart
Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)
Install Browser Extensions straight from GitHub Repositories
Whatsapp Web Messenger brings WhatsApp right into your browser to chat with your friends.
Gmail Manager Requires Restart
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.
Webmaster SAPE Requires Restart
Toolbar contains a set of functions, which expands the abilities of webmasters and optimizers, when working in the interface of SAPE exchange.
Save images and pages to your Pinterest account quickly and easily with Save Button for Pinterest.
YouTube Video Player Speed play YouTube videos in whatever speed you want
Message Seen Disable for Facebook™ lets you turn off Facebook™'s Message Seen feature automatically for your account. You can still use Seen feature for others.
Messenger for Facebook™ lets you bring a Messenger right into your browser to chat with your friends.
YouTube Videos Download in one click Requires Restart
Download YouTube videos by clicking a button underneath videos in YouTube. Save YouTube videos and songs in 1080p (HD) MP4 or FLV format.
Sidebar for Facebook™ brings Facebook™ right into your Firefox. Get notifications, status and photos from Facebook™ instantly.
YouTube Video Replay is a new tool that lets you replay YouTube Videos.
Forecastbar Enhanced Requires Restart
Note from Mozilla: This add-on has been discontinued. Try Forecastfox Weather instead.
Get international weather and weather forecasts with Forecastbar Enhanced.
Share Button for Facebook™ lets you share any web page on your Facebook™ Timeline by a quick button.
ALLYouTubeDownloader Requires Restart
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).
Youtube Video Center changes the new Youtube design and centers the whole Youtube page on the screen automatically.
Yahoo! Mail Notifier Requires Restart
This extension notifies you when new messages arrive in your Yahoo mailbox.
VKontakte.ru Downloader (music/videos/photos @ VK) Requires Restart
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.