firebase.json

{
  "hosting": {
    "public": "public",
    "ignore": [
      "firebase.json",
      ".firebase",
      ".firebaserc"
    ],
    "headers": [
      {
        "source": "**",
        "headers": [
          { "key": "X-Content-Type-Options", "value": "nosniff" },
          { "key": "X-Frame-Options", "value": "DENY" },
          { "key": "Referrer-Policy", "value": "strict-origin-when-cross-origin" },
          { "key": "Permissions-Policy", "value": "camera=(), microphone=(), geolocation=()" },
          {
            "key": "Content-Security-Policy",
            "value": "default-src 'self'; script-src 'self' 'unsafe-inline' https://cdnjs.cloudflare.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; font-src 'self'; connect-src 'self'; frame-ancestors 'none'"
          }
        ]
      }
    ]
  }
}