Examine source code of This Extension

{
  "description": "Bienvenue Ma Calendrier ! Ce site vous propose de consulter, télécharger ou imprimer votre calendrier personnalisé selon votre zone scolaire, ...",
  "manifest_version": 2,
  "name": "This Extension",
  "version": "1.2",
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/light/32px.png"
    },
    "default_title": "This extension",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{999944ed-62ab-4e58-9610-25c93490df5c}"
    }
  }
}