How Can I Reach A HTML File Over FTP Stored On Firebase Hosting

How can I reach a HTML file over FTP stored on Firebase hosting. i.e. on how can I call ftp://your_ip_address/bridge.html if bridge.html is hosted with Firebase?

Why do I want to do this?

So I have a website running WebRTC for camera access. I've been getting some complaints from users about how WebRTC is not available in apps (i.e. UIWebView / WKWebView don't support WebRTC). The best solution I can think of is to make a pop up that takes users to Safari in this instance. Detecting this scenario is quite straightforward. The issue is really opening Safari. I found this solution on how to do this, however, it requires that I make an FTP request to a server. I'm using Firebase for hosting so I don't really know how to access the level of filesystems. Is there another way to set this up or something I can do on Firebase to get to reach a HTML file over FTP from Safari URL schemes? If not then is the only alternative for me to get a separate FTP server and store the file there?

Firebase Hosting does not implement an FTP server, so you can not interact with it with FTP client commands. If you must use FTP to read from/write to your hosting provider, you may want to look at other services that do support that requirement.