Examine source code of National MS Walk

{
  "theme": {
    "images": {
      "theme_frame": "walkms.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#e89612"
    }
  },
  "version": "2.0",
  "name": "National MS Walk",
  "manifest_version": 2,
  "description": "Go to <a href=\"https://outgoing.prod.mozaws.net/v1/a4f9c109e4b9aad8d642da8bc6ec597be06bc41533265241bd266095e8b5db4c/http%3A//www.nationalmssociety.org/index.aspx\" rel=\"nofollow\">http://www.nationalmssociety.org/index.aspx</a> and please donate for a cure to MS"
}