Modify EXE to stop launching firefox

I'm using a wireless modem program from my ISP. This program automatically disconnect when it detects the line is idle. It does so in 2-5 minutes of idle time. Whenever I reconnect, It will automatically fi开发者_如何学编程re up my default browser to the ISP portal. I DID NOT pay them to shove their web portal in my face 50 times a day. The ISP provides no options for disabling this behavior. Can someone please show me how to hex edit the EXE program to stop it from annoying the hell out of me?

If thats the route you want to take then find a free hex editor for your system from : http://en.wikipedia.org/wiki/Comparison_of_hex_editors

And then search for hints. If it's obvious then you may be able to do something. Then again maybe not.

You can also look for programs that specifically deal with this annoyance, for example programs that do a network request every so often to keep the connection active.

If possible, try starting the program as another user, and deny this user read/execute access to your default browser's exe file.