Examine source code of cat Yellow

{
  "theme": {
    "images": {
      "theme_frame": "firefox-mong-header5.jpg"
    },
    "colors": {
      "frame": "#140505",
      "tab_background_text": "#120303"
    }
  },
  "version": "2.0",
  "name": "cat Yellow",
  "manifest_version": 2,
  "description": "Caterpillar Yellow"
}