Examine source code of Krypton

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Krypton",
  "manifest_version": 2,
  "description": "<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/915aeaa1df688079c23a594e9b89178b6a8cd728c1e8e2e8ab0aa2d689e397cc/https%3A//vk.com/krypton678\">https://vk.com/krypton678</a>"
}