Examine source code of Simply Black Fox

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxBlackHeader.png"
    },
    "colors": {
      "frame": "#f5e831",
      "tab_background_text": "#f5e831"
    }
  },
  "version": "2.0",
  "name": "Simply Black Fox",
  "manifest_version": 2,
  "description": "Simple header. No biggie."
}