Examine source code of SleepyCabin Theme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#efaefc",
      "tab_background_text": "#4400ff"
    }
  },
  "version": "2.0",
  "name": "SleepyCabin Theme",
  "manifest_version": 2,
  "description": "Sleepy Cabin theme for firefox, background made by me in photoshop, logo is the sleepy cabin logo. Visit them at <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/69c351bc421a4e835514f3ab9821452cd47bd61a961a16b7bf4d354468021149/http%3A//sleepycabin.com/\">http://sleepycabin.com/</a>"
}