This tool can open tcpdump nanosecond pcap files and display them in an interactive viewer for research purposes about Firefall's Matrix protocol.
If the packet captures you want to view are already saved in a tcpdump nanosecond pcap file (unlikely), proceed to step 3. Otherwise you should start at step 1.
Open the file containing the packet captures in Wireshark. In this case it's a pcapng.gz file. Then nagivate to [File]->[Export Specified Packets...].
Export all packets in the tcpdump nanosecond pcap format.
Open the FFPacketViewer and click [Open] in the toolbar.
Select the tcpdump nanosecond pcap file in the dialog. Then click [Open].