Examine source code of Easy-lxg

{
  "manifest_version": 2,
  "name": "Easy-lxg",
  "version": "1.2",
  "description": "Affiche toutes les pages d'un chapitre automatiquement sur littlexgarden.",
  "icons": {
    "48": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://littlexgarden.com/*"
      ],
      "js": [
        "setup.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "easylxg@gmail.com"
    }
  }
}