Gelbooru Image Viewer

Controls:
 └ Click on images to bring up the image viewer in a post list
   └┬ Click again to close the viewer
    └┬ Left Arrow: Previous image
     ├ Right Arrow / Spacebar: Next image
     ├ Up Arrow: Open the current image's post view webpage
     └ Down arrow: close the viewer

Userscript menu option:
 └ Current Image mode
   └┬ Sample only: load the sample image of higher resolution ones if available
    └ Always original size: ignore samples

Compatible and designed to work with Gelbooru Endless Scroll