Examine source code of Ryptonite Persona

{
  "theme": {
    "images": {
      "theme_frame": "ryptonitefirefoxpersona.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Ryptonite Persona",
  "manifest_version": 2,
  "description": "A persona based on <a href=\"https://outgoing.prod.mozaws.net/v1/b61dba7b8630f7ff7b95ed5187bc9795398602479342514a26a7c90e82eabdd8/http%3A//Ryptonite.com\" rel=\"nofollow\">Ryptonite.com</a>"
}