Examine source code of Mark Paper

{
  "theme": {
    "images": {
      "theme_frame": "Marco_Header.jpg"
    },
    "colors": {
      "frame": "#090d54",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Mark Paper",
  "manifest_version": 2,
  "description": "Marco Carta in concert: let Firefox have a soul!     \nTags: marco carta marc mark paper singer cantante canto canzone song music musica sardegna microphone microfono san remo amici jurman black nero"
}