Hi, We have been using ATW Desktop with FireFox to launch Oscar T5 application. Until yesterday it has worked fine with my computer: When I used to open FireFox and enter URL for the application, ATW Desktop will go to connected state. But today, the ATW Desktop remains in Listening mode. I already changed the FireFox property network.websocket.allowInsecureFromHTTPS value to True, but it didn't help. The ATW version is extend 10.4.1. I know there was some Windows updates installed when I yesterday shutted the computer down. Is there any troubleshooting steps to take to discover why ATW does not work anymore?