Firefox access on WAN-Interface

[gertfriend]

Hello, i use Firefox to access OPNsense from WAN with one limited IP. I set the configurationport to 44443. Since one of the last Firefoxupdates the performance to access the GUI is extremly slow so that i must wait 2 minutes until the GUI opens and also when i click on submenu in GUI the performance is slow. When i close Firefox i become a Crashscreen from Firefox.
I tried it with different OPNsense-Versions and on different Computers always the same. What can i do?

[bartjsmit]

Use a VPN. Source IP can easily be spoofed, and the port monitored. The is no security in obscurity.

Bart...

[gertfriend]

Found solution

In Firefox type about:support and there click "Refresh Firefox ..." and it worked.