Examine source code of CPS Testers New Tab

{
  "name": "Creek Falls",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "12311.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(112, 212, 91, 0.2)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(35, 102, 217, 0.22)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(219, 88, 88, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aa65dc72-c215-4ab2-b430-3d2436943d95}"
    }
  }
}