Examine source code of Everton 1

{
  "theme": {
    "images": {
      "theme_frame": "firefox_final_yla_lower.jpg"
    },
    "colors": {
      "frame": "#a9b0ac",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Everton 1",
  "manifest_version": 2,
  "description": "Nil Satis, Nisi Optimum..."
}