Examine source code of Pur sang

{
  "theme": {
    "images": {
      "theme_frame": "pursangnoir.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#dedede"
    }
  },
  "version": "2.0",
  "name": "Pur sang",
  "manifest_version": 2,
  "description": "Pur sang theme noir <a href=\"https://outgoing.prod.mozaws.net/v1/05083d5b7084f49c75ba0ce4373f276cbe0e66bf350c830ab380e452bf846fda/http%3A//soncheval.com\" rel=\"nofollow\">soncheval.com</a>"
}