Examine source code of Warmth & Smoke

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#570000",
      "tab_background_text": "#e8ba94"
    }
  },
  "version": "2.0",
  "name": "Warmth & Smoke",
  "manifest_version": 2,
  "description": "A warm and bright theme.\nBy STR Art (Erik Töpel)\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/49861f4bd5e2ef1499d67f02e89c2978aa2d23be83af205110af3909cd518130/http%3A//www.Facebook.com/STR.Art.Official\">www.Facebook.com/STR.Art.Official</a>\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/23af7a33c5217e62613e14e166c055c74e6b3e4d2a647c2546a9b5c239457948/http%3A//www.Straxit.DevianArt.com\">www.Straxit.DevianArt.com</a>"
}