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Windows 10 screen saver doesn't come on when I have Firefox version 46.0.1 open. When Firefox is minimized the screen saver comes on in Windows 10.

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When I have Firefox 46.0.1 open my screen saver will not turn. When I minimize Firefox the screen saver in Windows 10 will start.

When I have Firefox 46.0.1 open my screen saver will not turn. When I minimize Firefox the screen saver in Windows 10 will start.

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What page/s are open in Firefox when that happens?

Any chance that an open webpage is refreshing at some sort of interval?

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I have MSN as my home page, the only open tab. This happening on two windows 10 operating system PC'S I have. IE 11 and all other apps allow the screen saver to come on as scheduled.