Examine source code of Bamboo Vines

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Bamboo Vines",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/6fc94f0f277b840714652a39453127ea1184b27c450478baddf2ca3d725c16e0/http%3A//www.freepik.com/brgfx\">brgfx</a>"
}