Examine source code of Scratch-ed

{
  "theme": {
    "images": {
      "theme_frame": "scratchthing2.jpg"
    },
    "colors": {
      "frame": "#f0c30e",
      "tab_background_text": "#5ab6e8"
    }
  },
  "version": "2.0",
  "name": "Scratch-ed",
  "manifest_version": 2,
  "description": "This is like Scratch except it is Firefox-ized or maybe its Firefox scratched. (scratch is a website at scratch.mit.edu ) I made this for a scratchy theme!"
}