Thanks for your replies.
Why are you expecting us to make settings changes to work with CC site? It is not making sense.
If my browser settings in Windows computer work with other sites, like googe/yahoo/amazon … etc, without any issues. it should work with CC same way.
It look like, your site was not properly tested with multi browser basic/common settings before rollout.
I find many such sites focused their re-build for mobile users and failed with existing user base. It is not a wise decision. I am not sure, whether CC moving in that direction.