Examine source code of KAERO

{
  "description": "Kaero.be - Economisez grâce au cashback en Belgique",
  "version": "0.0.3",
  "manifest_version": 3,
  "short_name": "KAERO",
  "name": "KAERO",
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon128.png"
  },
  "icons": {
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "<all_urls>"
      ],
      "js": [
        "contentScript.bundle.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "cookies",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "injectTripInfoScript.js",
        "*.css",
        "icon128.png",
        "*.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7f6b9b01-949b-488d-9281-a33690da95a6}",
      "strict_min_version": "42.0"
    }
  }
}