Dark YouTube theme - apply Black Youtube & Facebook Skin. Dark YouTube theme protects eyes by changing Youtube & FB colors to black
Select some text, right-click and choose"Search image" in the menu, a Google Image tab will open with your results.
Reverse image search using various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
Speed up, slow down, advance and rewind any HTML5 video with quick shortcuts.
瞬间过滤B站(bilibili.com)刷屏的相似弹幕，还你清爽的弹幕视频体验。 *a tweak for a Chinese website. Please ignore this add-on if you are not a user of bilibili.com.*
Tons of features to improve your user experience on YouTube™.
Stops video autoplay and shows the preview thumbnail.
The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube™ and Beyond. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, Hulu, Metacafe, YouKu, etc.
Help you quickly open and download links in IDM (Internet Download Manager) - the best and fastest download manager on the market. Note: IDM™ is a trademark of Tonec Inc. Use of this trademark is subject to Tonec Permissions.
Open With PDF Reader addon send PDF links directly to a PDF viewer like Adobe Acrobat Reader. Compatible with new Firefox Quantum 57
Restores the "View Image" and "Search by Image" buttons in Google Images.
Just One Click to download any video from Youtube. Support new Firefox Quantum 57