Examine source code of Avalara Orange

{
  "name": "Avalara Orange",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "aaa.png"
    },
    "colors": {
      "frame": "rgba(255, 102, 0, 1)",
      "tab_background_text": "rgba(26, 26, 26, 1)",
      "toolbar": "rgba(5, 155, 210, 1)",
      "bookmark_text": "rgba(246, 246, 246, 1)",
      "toolbar_field": "rgba(252, 249, 252, 1)",
      "toolbar_field_text": "rgba(162, 162, 162, 1)",
      "tab_line": "rgba(255, 209, 178, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5ed650f4-2c9d-4821-adb3-db3ce245a923}"
    }
  }
}