Comment by jmillikin

Port 10080 is blocked on most browsers[0] per the WHATWG "bad ports" list[1]. That particular port was added to the list due to the Slipstream attack[2] that made the news a few years ago[3].

You don't have to switch to a browser that ignores standard security mitigations. Just pick a different port for your service.

[0] I just tested Chrome, Firefox, and Safari.

[1] https://news.ycombinator.com/item?id=24955891