Examine source code of Vinted — Prix moyen

{
  "manifest_version": 2,
  "name": "Vinted – Prix moyen",
  "version": "2.0.0",
  "description": "Extrait les prix des listings Vinted.fr et affiche un petit panneau avec le nombre d'annonces et le prix moyen.",
  "icons": {
    "16": "logo16.jpg",
    "48": "logo48.jpg",
    "128": "logo128.jpg"
  },
  "permissions": [
    "tabs",
    "storage",
    "https://www.vinted.fr/*",
    "https://vinted.fr/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.vinted.fr/*",
        "https://vinted.fr/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_title": "Vinted – Prix moyen"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{41802b87-e0f9-430e-9ae7-1b129848a63f}"
    }
  }
}