Need help understanding origin of request to load resource using wss:// on port 8888

WEB TMS WEB Core
1

I have a TMS Web Core PWA hosted on Github Pages. When it loads, the dev tools console shows that there is an attempt to set up a second connection to the main DOC using wss://...:8888/..... This attempt fails with the error shown below, presumably because Pages does not open port 8888. Why is that attempt made and how can I avoid it?
image

2

Do you use websockets somehow?

3

Not intentionally. What Web Core method would involve such a call?

4

By using the TWebSocketClient component for example.
Or perhaps you are using some JS lib that uses it underlying...?

5

The full source is here. I don't recognize any websockets calls. The only web-communications-related component on the form is TWebRESTClient and the declared CSS libraries are:

        <!-- Luxon -->
    <script src="https://cdn.jsdelivr.net/npm/luxon@latest/build/global/luxon.min.js"></script>
    <!-- Font Awesome 6.5.2 -->
    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css" rel="stylesheet"/>
    <!-- BootStrap 5.0.1 -->
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/js/bootstrap.bundle.min.js" type="text/javascript"></script>
    <link crossorigin="anonymous" href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet"/>
6

It is the project setting "Single Tab in Browser" that causes this.
Set this to false.

7

Thanks, Bruno! That seems to have fixed several issues that I encountered with FireFox Nightly on Android.

8

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