Examine source code of Last Killers

{
  "theme": {
    "images": {
      "theme_frame": "LK-person-2.jpg"
    },
    "colors": {
      "frame": "#2ea0f2",
      "tab_background_text": "#2ea0f2"
    }
  },
  "version": "2.0",
  "name": "Last Killers",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/325d0eea1ae5d51ad147e46ccddc274c27a00ec37a50aac9c79ae962948e0e3e/http%3A//www.last-killers.7x.cz\" rel=\"nofollow\">www.last-killers.7x.cz</a>"
}