I am using Firefox 26.0 on Windows 7 and tend to brows using multiple windows instead of tabs. Frequently when I click on a link in one window, the new page will begin to load and suddenly a firefox window that is in the back ground pops to the front, stealing the focus from the window I had been browsing in. There is no consistent pattern as to which websites or pages are loaded into the background windows that suddenly decide to steal focus. Likewise there is no pattern as to which links or actions I use that seem to cause this to happen. Is this a known issue? It is driving me absolutely nuts!