Examine source code of Nast.ws

{
  "theme": {
    "images": {
      "theme_frame": "picture.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Nast.ws",
  "manifest_version": 2,
  "description": "Motyw witryny <a href=\"https://outgoing.prod.mozaws.net/v1/247b4ae13195072290a70a6563e3963e9522bc879421a08615c55da2a4d7facd/http%3A//Nast.ws\" rel=\"nofollow\">Nast.ws</a>\nNajlepsze napisy do filmów i seriali"
}