Examine source code of Old Fashion

{
  "name": "Old Fashion",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "OldFAshionHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(221, 221, 221, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(222, 222, 222, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(219, 219, 219, 0.05)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4c70d21b-33fb-4163-99cd-5f48e475effe}"
    }
  }
}