Examine source code of Harley Davidson

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#0a0a0a",
      "tab_background_text": "#ededed"
    }
  },
  "version": "2.0",
  "name": "Harley Davidson",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/77ed447dd0d672870e73ae43e875313a575fccc252daffdfbf3a5f2a136cbdbc/https%3A//pixabay.com/en/users/MikesPhotos-1860391/\">MikesPhotos\n</a>"
}