Examine source code of BTS Wings

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#4d4d4d",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "BTS Wings",
  "manifest_version": 2,
  "description": "Inspired by BTS' Wings album;\nimage creds: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/7a1502ffe2473d8291530e9388687a68ee27533f67718360282b53fc35880299/https%3A//s3-ap-northeast-1.amazonaws.com/ibighit/bts/wings/background/wings-background-2.jpg\">https://s3-ap-northeast-1.amazonaws.com/ibighit/bts/wings/background/wings-background-2.jpg</a>"
}