Examine source code of RumbleBee.org

{
  "theme": {
    "images": {
      "theme_frame": "RumbleBee_Header.jpg"
    },
    "colors": {
      "frame": "#e0dd12",
      "tab_background_text": "#f7f9fa"
    }
  },
  "version": "2.0",
  "name": "RumbleBee.org",
  "manifest_version": 2,
  "description": "For members of <a href=\"https://outgoing.prod.mozaws.net/v1/17879707b6f328e15a5feb1e16676da194933fb5592961ba1f3638cf51bf8298/http%3A//RumbleBee.org\" rel=\"nofollow\">RumbleBee.org</a> members and all who enjoy the Dodge Ram."
}