Examine source code of Subtlety

{
  "theme": {
    "images": {
      "theme_frame": "Header1.jpg"
    },
    "colors": {
      "frame": "#2c4037",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Subtlety",
  "manifest_version": 2,
  "description": "Just checking out Persona!\n\nImaages derived from my \"Let's Play Dark Room\" \n(<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/5af5a07e35411c1bdad91326f92075889b1621eeac63759278f491729152e030/http%3A//arthermit.deviantart.com/art/Let-s-Play-Dark-Room-119737507\">http://arthermit.deviantart.com/art/Let-s-Play-Dark-Room-119737507</a>)"
}