Examine source code of Fog in the Fall

{
  "name": "Fog in the Fall",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "FogintheFallH.jpg"
    },
    "colors": {
      "frame": "rgba(136, 133, 135, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(138, 135, 137, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(138, 135, 137, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(237, 237, 237, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{45e4debb-3c47-4705-83a1-8362eee7b18f}"
    }
  }
}