Examine source code of Stormcloak Soldier

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#545454",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Stormcloak Soldier",
  "manifest_version": 2,
  "description": "For all the true sons and daughters of Skyrim, a simple yet striking theme for your Firefox browser."
}