using "Open File..." dialog (`⌘+O`) you could still open and view any file on the system and could preview any file that safari could preview (e.g. `.html`, `.htm`, `.txt`, `.pdf`, and image files)
大多数人认为Apple在更新后会修复安全漏洞，恢复模式的浏览器会被严格限制。但作者发现，即使在更新后的版本中，通过使用"打开文件"对话框，仍然可以访问和预览系统上的任何文件，这表明Apple的修复措施并不彻底，违背了人们对安全补效的预期。
Zastrow, M. (2020). Coronavirus contact-tracing apps: Can they slow the spread of COVID-19? Nature. https://doi.org/10.1038/d41586-020-01514-2
Mueller, J. (2020 May 19). COVID-19: What the Technical Foundation of the Corona-Warn-App in Germany looks like | SAP Blogs. https://blogs.sap.com/2020/05/19/covid-19-how-the-technical-foundation-of-the-corona-warn-app-in-germany-looks-like/
If Bluetooth is ON on your Apple device everyone nearby can understand current status of your device, get info about battery, device name, Wi-Fi status, buffer availability, OS version and even get your mobile phone number