Examine source code of Connect'Clic

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Connect'Clic",
  "manifest_version": 2,
  "description": "Thème aux couleurs de Connect'Clic :\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/e0740da5daa54bf67171db5cff2a66c29d6f98853e24ba2330fc0ba957f4b592/https%3A//connectclic.weebly.com/\">https://connectclic.weebly.com/</a>"
}