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.
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.
YouTube Video Player Speed play YouTube videos in whatever speed you want
Messenger for Facebook™ lets you bring a Messenger right into your browser to chat with your friends.
Save images and pages to your Pinterest account quickly and easily with Save Button for Pinterest.
Whatsapp Web Messenger brings WhatsApp right into your browser to chat with your friends.
Toolbar Button for Facebook™ lets you visit your favorite Facebook™ quickly and easily by adding a special button to your Toolbar.
Photo Zoom for Facebook™ lets you zoom Facebook™ images.
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).
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.
Zindus Requires Restart
Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)
YouTube Video Player Preview lets you preview YouTube videos when you hover over thumbnails.
YouTube Video Replay is a new tool that lets you replay YouTube Videos.
Install Browser Extensions straight from GitHub Repositories
Share Button for Facebook™ lets you share any web page on your Facebook™ Timeline by a quick button.
Sidebar for Facebook™ brings Facebook™ right into your Firefox. Get notifications, status and photos from Facebook™ instantly.
Yahoo! Mail Notifier Requires Restart
This extension notifies you when new messages arrive in your Yahoo mailbox.
Youtube Video Center changes the new Youtube design and centers the whole Youtube page on the screen automatically.
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.