Examine source code of Runefox

{
  "theme": {
    "images": {
      "theme_frame": "runefox.jpg"
    },
    "colors": {
      "frame": "#fcc272",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Runefox",
  "manifest_version": 2,
  "description": "Firefox spelled in Elder Futhark runes.\n(bronze set in stone.)"
}