I've tried to run this down for two hours and can find nothing to explain the behavior. I recently received a medical bill that contained the following paragraph: Pay online at www.mychart.utsouthwestern.edu Entering this in my Firefox Address/Search Bar yields the results in Addr/Search Bar _01.png. The same results display in Safari and Chrome, so it's not Firefox specific. If you've tried this without the "www", you know it works fine and the simple answer is, "Don't put the freaking www in your address bar!" I know, I know, but as most of you can attest, once you've opened the hood, it's tough to walk away until you've figured out how stuff happens. This only occurs when an address with dot separated words (mychart.utsouthwestern.com, or customercare.allstate.com) are used. A simple address (www.ifixit.com, for instance) goes to the proper page. My biggest question is how this is defaulting to, what appears to be, an ATT search bar? ATT does provide my broadband service and I am using an ATT modem/router (yeah, I know, eyeroll...), but nothing in my Preferences opens the door to this kind of event. Any ideas on why it happens and, maybe, how I can stop it? Bothers me that with all my efforts to control my browsing exposure and almost 40 years of tech experience that something this inexplicable can occur. BTW: In the old days, I'd have spent most of the night trying to figure this out, but now that I'm in my older days, I don't have the stamina to pull those marathon treks for enlightenment.