Examine source code of Cat_jm

{
  "theme": {
    "images": {
      "theme_frame": "cat.jpg"
    },
    "colors": {
      "frame": "#570606",
      "tab_background_text": "#780c0c"
    }
  },
  "version": "2.0",
  "name": "Cat_jm",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/f03b739beaff3fffc2ec1186ace2061a9fe4ee1c6c7296c2a3bc54140f5347c8/http%3A//www.januszmaciejowski.pl\" rel=\"nofollow\">www.januszmaciejowski.pl</a>"
}