Examine source code of Autumn Grunge

{
  "name": "Autumn   Grunge",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "FallGrungeHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(227, 230, 129, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(227, 230, 129, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(230, 216, 135, 0.06)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f68fd619-02af-47be-a973-37b11cf5b659}"
    }
  }
}