connection time out is just down to site response time
It may not be responding quickly enough to your browser request, so it assumes "not responsive, timeout"
SOme browsers will give you a popup "continue waiting kind of message"
I have had issues in the past with slow response from their site, but not recently.
Maybe try something like this suggestion with firefox
https://support.mozilla.org/en-US/questions/998088Not sure if it will help, as another blog suggest the feature is no longer used, but its easy to change back again anyway.
Chrome apparently does not allow adjusting the timeout at all.