Examine source code of Perfect Review

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Perfect Review",
  "manifest_version": 2,
  "description": "Visit website: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/b519c892b4d7cbb1467ffe07ca7405235768d599d7a7f63997e7ea8d29caec4d/https%3A//perfect-review.com\">perfect review</a>"
}