I am trying out Windows 8 and I see white flashes whenever I open a tab (and immediately switch) in Firefox. In Windows 7, I was able to get rid of this by setting the
Application Background color to black. The registry value that corresponds to this color is the same for both OS, but the behaviors are different.
[HKEY_CURRENT_USER\Control Panel\Colors] "Window"="0 0 0"
The Firefox I am running is version 20.0, but this behavior was also tested in 19.0 Google Chrome always had white flashes.