Examine source code of Sunset Collage

{
  "name": "Sunset Collage",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Susnets2H.jpg"
    },
    "colors": {
      "frame": "rgba(173, 134, 79, 1)",
      "tab_background_text": "rgba(255, 255, 0, 1)",
      "toolbar": "rgba(173, 137, 79, 0)",
      "bookmark_text": "rgba(255, 255, 0, 1)",
      "toolbar_field": "rgba(173, 137, 79, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 0, 1)",
      "tab_line": "rgba(255, 255, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{73fdf35c-b185-45a0-90a0-6c3d5e8d68af}"
    }
  }
}