Examine source code of Reduk

{
  "manifest_version": 2,
  "name": "Reduk - Le dénicheur de codes promo !",
  "version": "1.2",
  "description": "Recherche les codes promotionnels pour le site Web e-commerce visité.",
  "icons": {
    "64": "images/iconeReduk.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "images/iconeReduk.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "popup.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d23bd5f-1e93-4896-b60b-5961a91fd3e6}"
    }
  }
}