Examine source code of Hat Kid

{
  "name": "Hat Kid",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "hkfinal.png"
    },
    "colors": {
      "frame": "rgba(70, 24, 122, 1)",
      "tab_background_text": "rgba(224, 175, 0, 1)",
      "toolbar": "rgba(113, 0, 194, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(56, 0, 112, 1)",
      "tab_line": "rgba(224, 175, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fb54a376-8f0f-42fd-84b3-29acf9f16769}"
    }
  }
}