Examine source code of Smiling moon

{
  "theme": {
    "images": {
      "theme_frame": "Persona_lune.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Smiling moon",
  "manifest_version": 2,
  "description": "For more information, see <a href=\"https://outgoing.prod.mozaws.net/v1/32794ad0017e1b9347bb32c6e44a430aa55592d5a345f3ac54474ba15cd80b20/http%3A//www.cnes.fr\" rel=\"nofollow\">http://www.cnes.fr</a>"
}