stg83: You have entered fullscreen mode that is why the window outline and the X in top right corner is not showing. Press "F11" to get out of fullscreen and it should be like it was before. Regarding the other thing I am not really sure but if you post a screenshot then maybe I could help you out.
EDIT: Glad everything is working as you want it to now. :)
Actually, it's not. I spoke too soon.
I found the "screen" I was looking for when I pressed F12, it is entitled "Emulation" I believe. Once I switched to that, the old screen I was always used to pops up when I hit F12.
However, this "fix" no longer works on the secure websites I was having trouble with before where the screen would be "blank" of any personal data. The screen outline would show up, but no data such as my account balance, etc. Just a big empty screen with the bank's name at the top.. Before, once I would F12 and changed the document mode from "Edge" to "10" the screen would reload and my information would be visible.
Now, when I hit F12, switch from "Edge" to "10" the F12 screen immediately switches to debugger mode, and the main screen is not available.
So now I once again can't access those sites, where for months switching from "Edge" to "10" worked, it apparently no longer does. Yet I've changed nothing on my end that I'm aware of.