Examine source code of Country Snowman

{
  "name": "Country Snowman",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "CountrySnowmanH.jpg"
    },
    "colors": {
      "frame": "rgba(61, 112, 61, 1)",
      "tab_background_text": "#ffffff",
      "toolbar": "rgba(61, 112, 62, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(61, 112, 62, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(252, 252, 252, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ddcd5ab0-2259-4815-9709-a02dbcff556a}"
    }
  }
}