Examine source code of A Modest Persona

{
  "theme": {
    "images": {
      "theme_frame": "pattern.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "A Modest Persona",
  "manifest_version": 2,
  "description": "Taken from...\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/79a68eca2b78bbd1f9e37ae1347b0a0b5c63b9729ecb3548cce5c6907ad7353f/http%3A//www.modestmousemusic.com/\">http://www.modestmousemusic.com/</a>"
}