Examine source code of Graffiti Wall.

{
  "theme": {
    "images": {
      "theme_frame": "GraphitiWallH.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Graffiti Wall.",
  "manifest_version": 2,
  "description": "painted, vintage, old, walls, graffiti, dark, goth, My matching wallpaper can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/8e117bd624a7da344815b3eb823c2094c1888f55a4132ce343aaa204eba29165/http%3A//abstract.desktopnexus.com/wallpaper/602525/\" rel=\"nofollow\">http://abstract.desktopnexus.com/wallpaper/602525/</a>"
}