Examine source code of SPEED NAVIGATOR

{
  "manifest_version": 2,
  "name": "Éclairage PC - Nuit/Jour",
  "version": "1.0",
  "description": "Bascule entre les modes nuit et jour pour l'éclairage de votre PC",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/icon-32.png",
    "default_title": "Éclairage PC",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1696930c-4f52-4b8a-8bca-a86f00e80c58}"
    }
  }
}