Examine source code of French Countryside

{
  "theme": {
    "images": {
      "theme_frame": "French-Countryside-Firefox-Header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "French Countryside",
  "manifest_version": 2,
  "description": "Taken from the cover of Martin Taylor's French inspired album 'Last Train to Hauteville'.  <a href=\"https://outgoing.prod.mozaws.net/v1/82628c0f9a2fbf786e895de3bec6d0a6083ff9035a099045ce762b2a2e7bf454/http%3A//www.martintaylor.com\" rel=\"nofollow\">www.martintaylor.com</a>"
}