Issue:
Unable to access PowerChute Business Edition or PowerChute Network Shutdown web interface with default browser using localhost as the IP address
Example: https://localhost:6547

Products:
PowerChute Business Edition web Agent all version
PowerChute Network Shutdown web client all version

Environment:
Linux OS running Mozilla Firefox versions 37, 38, 39, 40

Cause:
https://bugzilla.mozilla.org/show_bug.cgi?id=1148766

Solution:
Upgrade Mozilla Firefox to version 51.or access the web interface using https://<system IP>:6547 
Examples: https://192.168.1.10:6547