I’ve been looking for a way to create high quality gifs on a chromebook and here it is!
Chrome Web Store – MakeGIF Video Capture
Capture HTML5 videos in your browser and turn them into GIF animations. Capture any HTML5 video from popular sites like YouTube or Vimeo and convert them into GIF animations instantly. Set size, frame rate, add text and upload your finished GIF to share with friends or save it to your computer.