Examine source code of Country Fall

{
  "name": "Country  Fall",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(18, 17, 18, 1)",
      "tab_background_text": "rgba(255, 222, 74, 1)",
      "toolbar": "rgba(18, 17, 18, 0)",
      "bookmark_text": "rgba(255, 222, 74, 1)",
      "toolbar_field": "rgba(64, 55, 64, 0.08)",
      "toolbar_field_text": "rgba(255, 222, 74, 1)",
      "tab_line": "rgba(255, 222, 74, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{37819344-0153-4a59-a654-dbb14cda1a0d}"
    }
  }
}