Examine source code of Desert Fallout

{
  "theme": {
    "images": {
      "theme_frame": "firefoxPersona.jpg"
    },
    "colors": {
      "frame": "#aa967c",
      "tab_background_text": "#dcdcba"
    }
  },
  "version": "2.0",
  "name": "Desert Fallout",
  "manifest_version": 2,
  "description": "A dark orange desert sun. Possibly one last view after the nukes hit the southwest United States. Dark Orange, Dark Red."
}