Examine source code of firefox painted

{
  "theme": {
    "images": {
      "theme_frame": "ffpersonatop.JPG"
    },
    "colors": {
      "frame": "#eb8900",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "firefox painted",
  "manifest_version": 2,
  "description": "firefox logo done in GIMP with a gray background."
}