Examine source code of Autumns Brightness

{
  "name": "Autumns Brightness",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "RedLeavesH.jpg"
    },
    "colors": {
      "frame": "rgba(138, 20, 14, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(138, 20, 14, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(138, 20, 14, 0.06)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee8a9f87-ce15-4f07-8153-b6f24483a2e1}"
    }
  }
}