Examine source code of PassKey

{
  "manifest_version": 3,
  "name": "PassKey",
  "version": "1.0.1",
  "author": "Giuseppe Imperato",
  "homepage_url": "https://github.com/pexatar/PassKey",
  "description": "Local password manager integration for PassKey desktop app. Autofill credentials, credit cards and identities stored securely on your PC — no cloud, no subscription.",
  "permissions": [
    "nativeMessaging",
    "activeTab",
    "tabs"
  ],
  "host_permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3E08FACC-D43B-4B20-89E7-7888F6082E9D}",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "scripts": [
      "lib/messages.js",
      "lib/crypto.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "lib/url-utils.js",
        "lib/messages.js",
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "action": {
    "default_popup": "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"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}