Examine source code of Screen Spoofer

{
  "manifest_version": 2,
  "name": "Screen Spoofer",
  "version": "1.21",
  "description": "Private screen simulation utility for internal use by authorized developers. Simulate any website in custom or predefined screen resolutions using a secure popup interface.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "history",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "login.html",
    "default_icon": {
      "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>"
      ],
      "js": [
        "inject-user-agent.js",
        "inject-timezone.js",
        "content.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "auto-type.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "icons/icon-16.png",
    "icons/icon-32.png",
    "icons/icon-48.png",
    "icons/icon-128.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "screen-spoofer@uniqueincomeus.site",
      "strict_min_version": "126.0"
    }
  },
  "author": "Uniqueincomeus",
  "homepage_url": "https://www.uniqueincomeus.site",
  "content_security_policy": "script-src 'self'; object-src 'self';"
}