Examine source code of Epitech Calendar Sync

{
  "manifest_version": 3,
  "name": "Epitech Calendar Sync",
  "version": "1.0.1",
  "description": "Synchronise le calendrier de l'intranet Epitech vers Google Calendar, Outlook ou fichier ICS",
  "browser_specific_settings": {
    "gecko": {
      "id": "epitech-calendar-sync@romainh.dev",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "identity",
    "notifications",
    "alarms"
  ],
  "host_permissions": [
    "https://intra.epitech.eu/*",
    "https://www.googleapis.com/*",
    "https://graph.microsoft.com/*"
  ],
  "background": {
    "scripts": [
      "background/index.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://intra.epitech.eu/*"
      ],
      "js": [
        "content/detector.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup/index.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Epitech Calendar Sync"
  },
  "options_ui": {
    "page": "options/index.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}