Examine source code of Riven1

{
  "theme": {
    "images": {
      "theme_frame": "Riven1persona.jpg"
    },
    "colors": {
      "frame": "#0d0b0b",
      "tab_background_text": "#cc7426"
    }
  },
  "version": "2.0",
  "name": "Riven1",
  "manifest_version": 2,
  "description": "!st attempt at a firefox persona, Riven: The sequel to Myst, was the first game i played in the franchise and i loved it. I think all my first personas will be MYST oriented."
}