I'm primarily a Firefox (FF) user myself. I've received and sent several PMs today without any issues. I will close FF and save the sessions then when I restart the previous windows will be reopened. This doesn't mean that I've been logged on the whole time just that FF has saved the URLs of the pages that I was viewing and will go back to those same pages on restart of FF. I usually have 3 - 6 RCU tabs open concurrently, maybe more. I know that RCU has a bunch of servers facing and serving the internet. Mostly they are not displayed on your screen unless you're looking at RCU Magazine then you'll see shaded text at the bottom that has "RCU4" or something similar. RCU4 is one of their servers.