Examine source code of Multi Picture

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#eeff00",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "Multi Picture",
  "manifest_version": 2,
  "description": "This is my creation for firefox.\nIt is very simple to make\nFirst, go to <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/e2c2ced082c71ae2ddf535033b7added1afb77a55e152a254c581855f9f401d0/http%3A//www.picmonkey.com\">http://www.picmonkey.com</a>\nNext, click on upload to upload a 3000x200 picture\nEtc"
}