Examine source code of Comfy Foggy Forest

{
  "name": "Comfy Foggy Forest",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "tema bosque firefox 1.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0)",
      "tab_background_text": "rgba(245, 245, 245, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(245, 245, 245, 1)",
      "toolbar_field": "rgba(42, 42, 42, 1)",
      "toolbar_field_text": "rgba(245, 245, 245, 1)",
      "tab_line": "rgba(42, 42, 42, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{52b08e9c-d182-4953-83c0-e4cc45a657e8}"
    }
  }
}