With Firefox (Windows 10) there is annoying screen refresh and loss of data as I log in to a couple financial web sites. Main page loads and after 3-4 seconds the screen refreshes. I usually remember to wait the 3-4 seconds but just curious what is going on. It only refreshes when there is a sign-in input on the main page and history set to 'never remember' or 'custom/private' setting. When I refresh firefox (back to remember history) there is no problem. It's like the web page is loaded from global storage and then because privacy is on another page is loaded from local storage or vice versa. I did check the source code on one site and it appears to be identical regardless of my privacy setting. I found two sites with main page sign in input that are unaffected and two that refresh.