Examine source code of Sitting in a Tree

{
  "theme": {
    "images": {
      "theme_frame": "SittinInATreeHeader.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Sitting in a Tree",
  "manifest_version": 2,
  "description": "I really, really, really like Vera Bradley's Sittin' in a Tree pattern, so here it is! Thanks to <a href=\"https://outgoing.prod.mozaws.net/v1/61a0aa8a9f66073edc14808b5db819125af8cfac26abae46890827ef154bead1/http%3A//verabradley.com\" rel=\"nofollow\">verabradley.com</a> for the header image. :D"
}