Examine source code of Snow Geese.

{
  "name": "Snow Geese.",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "SnowgeeseH.jpg"
    },
    "colors": {
      "frame": "rgba(239, 239, 231, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(240, 240, 231, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(240, 240, 231, 0.1)",
      "toolbar_field_text": "rgba(3, 3, 3, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{99a1f6f2-5f14-41e9-9ed8-57dd9ac5c4a3}"
    }
  }
}