When using burpsuite to capture packets, the record always catches a lot of packets below, which is particularly annoying. Moreover, it keeps grabbing and drowns all the data that should be seen. You can set it as follows: firebox will no longer send this URL to burpsuite.

1. Enter in the address bar of firebox:

about:config

2. Search for the following and set it to false

network.captive-portal-service.enadbled