Examine source code of mobile-simulator-tool

{
  "manifest_version": 2,
  "name": "Viewport Simulator",
  "version": "1.0.1",
  "description": "Simula cómo se ve la página actual en diferentes dispositivos móviles",
  "developer": {
    "name": "Lautaro Carnevale"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "carnevalelautaro72@gmail.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "scripts": [
      "src/background/background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "src/content/content.css"
      ],
      "js": [
        "src/shared/constants.js",
        "src/shared/devices.js",
        "src/shared/browsers.js",
        "src/content/state.js",
        "src/content/phone-builder.js",
        "src/content/control-panel.js",
        "src/content/simulator.js",
        "src/content/content.js"
      ]
    }
  ]
}