Can I synchronize the clock in my computer with official FireDispatch.com time?

Yes, but to do this you need to install a Time Client that can acquire precise time from an Internet-based source such as FireDispatch.com. A couple of good examples are AboutTime and Dimension 4. When you configure these applications you provide the Time Server that you desire to synchronize with.

The FireDispatch.com time server is named time.firedispatch.com. It uses the Simple Network Time Protocol (SNTP).