YouTube Video Player Speed play YouTube videos in whatever speed you want
YouTube Video Player Preview lets you preview YouTube videos when you hover over thumbnails.
This extension makes browsing for extensions easier at addons.mozilla.org. It fixes incorrect information about some extensions being not available for SeaMonkey and adds links to the Add-on Converter where needed.
This extension to download audio and video from popular video hosting YouTube. To download the available formats mp4, webm, mp4a, mp3.
Web Messenger for WhatsApp™ brings web messenger right into your browser to chat with your friends.
En 4 pasos envía la serenata, sencillo, seguro y rápido.
Shows country flag for the website in the location bar.
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.
Quick access to your Linagora ESN network
/r/CFB Easy Flair Requires Restart
Easily insert flair into /r/CFB posts with a shorthand system.
Access to full-resolution product images and videos on various shopping sites is easy with this add-on. It adds links to the largest/xxl/best-size version of product images on various shoppings sites.
Open-source code on github.com/ShopCompanion
Pins a YouTube video to the page so that it is always visible while you scroll and read comments. Port of Chrome's Video Pinner extension
Install Browser Extensions straight from GitHub Repositories
Super Mario Cross Requires Restart
The legendary arcade game that has survived the ages and can still be found today in modern arcades. You may have played this game when you were a kid and want to have a bit of fun remembering what it was like.
WOT Play Replay Requires Restart
Данное приложение расширяет возможности сайта wotreplays.ru
Photo Zoom for Facebook™ lets you zoom Facebook™ images.
Save images and pages to your Pinterest account quickly and easily with Save Button for Pinterest.
Sidebar for Facebook™ brings Facebook™ right into your Firefox. Get notifications, status and photos from Facebook™ instantly.
Messenger for Facebook™ lets you bring a Messenger right into your browser to chat with your friends.
Youtube Video Center changes the new Youtube design and centers the whole Youtube page on the screen automatically.