Examine source code of Shwatsonlock 3

{
  "theme": {
    "images": {
      "theme_frame": "here.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Shwatsonlock 3",
  "manifest_version": 2,
  "description": "\"Lay Your Head on My Pillow\"\nDetective Sherlock Holmes Doctor John Watson Slash Shwatsonlock Gay Yaoi Robert Downey Jr Jude Law\nArtist: ShadowCat2503 (DeviantArt)\n\n<a href=\"https://outgoing.prod.mozaws.net/v1/4ab44a76899460a9cb60e269c64ba777b0e18735fb0afa426db186f775d89770/http%3A//shadowcat2503.deviantart.com/\" rel=\"nofollow\">http://shadowcat2503.deviantart.com/</a>"
}