Examine source code of CONDITION RED ALERT

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxHeader.png"
    },
    "colors": {
      "frame": "#bfbfbf",
      "tab_background_text": "#f20808"
    }
  },
  "version": "2.0",
  "name": "CONDITION RED ALERT",
  "manifest_version": 2,
  "description": "Put your computer in Red Alert Status with this Star Trek themed Persona."
}