Grab and download media (image, audio, and video) resources by monitoring network (like FlashGot or Flash video downloader extensions)
Google Reverse Image Search The only add-on in this category capable of searching local files from the computer
a customizable extension to save the images from the current tab page
Capture, Reverse Image Search is a powerful capturing reverse image search tool built on top of TinEye engine.
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.
Reverse image search using various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
Open and download links in IDM (Internet Download Manager) easily
The YouTube Mp3 Downloader Add-on includes a Button on any YouTube Page and allows you to convert the YouTube Video to a Mp3 with just one click. Compatible with new Firefox Quantum 57
Open With PDF Reader addon send PDF links directly to a PDF viewer like Adobe Acrobat Reader. Compatible with new Firefox Quantum 57
Experience a beautiful image from Google Earth every time you open a new tab.