Select some text, right-click and choose"Search image" in the menu, a Google Image tab will open with your results.
Google Reverse Image Search The only add-on in this category capable of searching local files from the computer
TinEye is a reverse image search engine. The extension adds a context menu item so you can search for an image to find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions.
Speed up, slow down, advance and rewind any HTML5 video with quick shortcuts.
Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.
Take a screenshot from the entire webpage with one click.
Displays player controls for video content on Instagram. Because why isn't that already a feature?
This extension adds 'Original' buttons to open images in original size on Twitter (https://twitter.com/*) or on TweetDeck (https://tweetdeck.twitter.com/). When there are multiple images, they are displayed on a single tab.
Play YouTube™ Videos in the Highest or Lowest Available Quality
Lets you fix annoying sound problems in YouTube videos and such. Like audio in one channel only, too quiet or too loud. (Unfortunately, doesn't work on many other websites because of cross-domain issues — but it does work on YouTube.com!)
Take a screenshot of the current web page, add annotations if needed, and save it as an image in HD.
Complete YouTube video download is the ultimate YouTube downloader that allows you to save any video from YouTube to your favorite format (MP3, MP4, WEBM, M4A, 3GP, Subtitles and thumbnails)