Examine source code of A Country Sunset

{
  "name": "A Country Sunset",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "AnotherSunsetH.jpg"
    },
    "colors": {
      "frame": "rgba(46, 32, 0, 1)",
      "tab_background_text": "rgba(255, 255, 3, 1)",
      "toolbar": "rgba(48, 34, 0, 0)",
      "bookmark_text": "rgba(255, 255, 0, 1)",
      "toolbar_field": "rgba(48, 34, 0, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 0, 1)",
      "tab_line": "rgba(255, 255, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8807b9b1-f6c3-4be3-a840-205e22cef818}"
    }
  }
}