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Firefox 6.0 randomly maximizes by itself. How can I prevent this?

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Doesn't matter what program I'm using; FF can be running in background or minimized, and it suddenly pops open in front of everything/anything else I'm working on.

Doesn't matter what program I'm using; FF can be running in background or minimized, and it suddenly pops open in front of everything/anything else I'm working on.

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Someone else posted basically the same question a couple hours ago, also a MacOSX user. https://support.mozilla.com/en-US/questions/875456 (no responses yet)