Examine source code of Powerdmarc New tab

{
  "name": "The Scottish Highlands",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "11122.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(76, 160, 212, 0.67)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(96, 206, 240, 0.31)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(227, 73, 73, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a9716e72-b261-4398-a32d-ead3ac5b7f6c}"
    }
  }
}