Sets a checkerboard (or color) background on images viewed standalone.
当前为
Userscript port of Image Background Color Picker
https://addons.mozilla.org/en-US/firefox/addon/image-background-color-picker
https://chrome.google.com/webstore/detail/image-background-color-pi/mncidhppmkifjpbcjbhkcbdlgdjgbpah
