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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.

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I've never seen this behaviour in Firefox, Chrome, or any other browser on Windows 7 or Windows 8. Are you running up-to-date graphics drivers? Is your CPU powerful enough? – Dai Apr 7 '13 at 9:25
@Dai. This behavior happens for a split of second right before the page loads. I am running 3rd gen Intel Processor. I think its CPU and integrated GPU do not have any issues and they are loaded with the latest drivers. – Forethinker Apr 8 '13 at 5:18
Did my answer end up working for you? – blackwind Mar 25 '15 at 19:56
@blackwind Unfortunately not, I gave up on using contract mode for a while now. – Forethinker Mar 25 '15 at 21:46

Take a look at Tools > Options > Content > Colors. Even if you have "Use system colors" checked, Firefox still (for whatever reason) defaults in-progress tabs to the colors specified in this dialog. Change the "Background" color setting to black and restart Firefox to achieve your desired behavior.

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