Examine source code of Yellow & Blue

{
  "name": "Yellow & Blue",
  "manifest_version": 2,
  "version": "7.0",
  "theme": {
    "images": {
      "theme_frame": "foto3d.png"
    },
    "colors": {
      "frame": "rgba(9, 73, 224, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(9, 73, 224, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(235, 178, 21, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(235, 178, 21, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0d799a9a-e1bd-496c-bc23-d4779f9dd317}"
    }
  }
}