Firewall and Cyberfox update

I'm using Cyberfox x64 as default browser and can't normally update it to latest version 36.0.1: Firewall in NS 2015 reduce browsing speed, I have to wait for some seconds before any site is started loading. After opening the site it's pages are opening normally, but the initial delays are annoying. All rules for the .exe file are set to Allow, but the normal browsing speed returns only if I disable Firewall or install older CF 36.0. Is there any way to completely exclude the program from Firewall work, or is there any other solution?