If AcuToWeb is running with SSL enabled then AcuToWeb Desktop will not attach to the program when running in the Firefox browser.
This is caused by a configuration option in Firefox that locks down web sockets when visiting a secure https:// URL
To allow the connection between the program running in the Firefox browser and AcuToWeb Desktop, navigate to the following address in the Firefox browsers address bar:about:config
In the search bar of that page (not the browsers address bar) search for the following setting:network.websocket.allowInsecureFromHTTPS
Right click on this setting and click ‘Toggle’. The value should now be ‘True’
Now when visiting the AcuToWeb connection setup screen after starting AcuToWeb Desktop, it will attach correctly and be waiting for the program to start.