Video DownloadHelper - Browser extension to download videos from the Web

Enhancer for YouTube - Tons of features to improve your user experience on YouTube™!

FlashGot - FlashGot is a browser extension for Mozilla Firefox that is designed to make it easy to download a whole batch of files in one go. The extension is open source and free to use, but it is no longer compatible with the most recent version of Firefox.

Magic Actions for YouTube - Magic Actions is an extension that changes the way you’ll watch videos on YouTube.

ClipGrab - A friendly downloader for YouTube and other sites

ImprovedTube - Allows you to improve and enhance Youtube visually or enable dozens of new features permanently or...