Examine source code of Ubuntu Clean

{
  "theme": {
    "images": {
      "theme_frame": "head.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Ubuntu Clean",
  "manifest_version": 2,
  "description": "My first Persona skin based on Ubuntu logo. Visit my catalan blog at <a href=\"https://outgoing.prod.mozaws.net/v1/db8e156508ce166858759a53aa96ced51979a5b709b5ceb964f2a82bfa6d3826/http%3A//laveudet.blogspot.com\" rel=\"nofollow\">laveudet.blogspot.com</a>"
}