Examine source code of uke GCEA

{
  "theme": {
    "images": {
      "theme_frame": "gceaheader.jpg"
    },
    "colors": {
      "frame": "#ed7315",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "uke GCEA",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/f3d4f6334cc803b2dcf360a7229293f1de20cdab2c4cac3da683a52cf35e8849/http%3A//www.ukulele.fr\" rel=\"nofollow\">www.ukulele.fr</a>"
}