Bizarre glitch in Chrome or a settings change?

When I quickly double click on the desktop icon for Firefox, the browser opens just fine. When I do the same thing for Chrome, two identical browser windows open. Any reason for this that I can fix? Never happened before. Not a major pain to close one, but is there a way to stop it from happening?

i have the same problem with Chrome. I do not have Firefox, but do have IE. Also, whenever I use the middle button on the mouse, two identical tabs open so I do not use the middle button any more. So I’d be interested in a solution, but this is no big deal. I just live with it.

Yeah, but this just started. It’s so bizarre to have something just randomly malfunction. No one knows how to fix this??