Examine source code of PassVault

{
  "name": "Password Manager",
  "description": "Manages passwords.",
  "version": "1.0",
  "manifest_version": 3,
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "webNavigation",
    "scripting"
  ],
  "host_permissions": [
    "http://localhost:5000/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "./icon.png"
    }
  },
  "icons": {
    "128": "./icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "jonnysmith445@icloud.com",
      "strict_min_version": "102.0"
    }
  }
}