GFork

Summary

Centers horizontally and vertically any image opened directly in your browser. You can configure background color & which images to fit to window and which to leave in original size when opened.

* A brother of Handy Just Image but for all images you open in your browser

Hotkeys

• WASD \ arrows \ num4862 - scroll image to right\left\top\bottom accordingly
• Q \ num5 \ click on image - resize image from fullsize to original and vica versa
• ctrl+space and ctrl+shift+space - simular to scroll of spacebar but horizontally
  
• P \ menu item - open configuration page
  

Supported browsers:

P.S. - If you want Greasemonkey to run on file:/// urls, you have to set the option to "true" (in about:config).

greasemonkey.fileIsGreaseable

The default value is "false".