Examine source code of Password Storage

{
  "manifest_version": 3,
  "name": "Password Storage",
  "version": "1.0.1",
  "description": "Store website account information securely in your browser",
  "icons": {
    "16": "icons/lock.png",
    "32": "icons/lock.png",
    "48": "icons/lock.png",
    "128": "icons/lock.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "eerie@passwordstorageaddon",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_title": "Password Storage",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ]
}