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Full screen video minimizes on second screen when clicking on first

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When putting MLB.TV on my second screen and then having it show full-screen, it will return to the smaller size as soon as I click on my first monitor's screen. This does not happen with other browsers like IE. Can I prevent Firefox from exiting MLB.TV's full screen mode when I click on another screen?

When putting MLB.TV on my second screen and then having it show full-screen, it will return to the smaller size as soon as I click on my first monitor's screen. This does not happen with other browsers like IE. Can I prevent Firefox from exiting MLB.TV's full screen mode when I click on another screen?

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I'm not sure if there is a workaround to this but I would probably file a bug for this at https://bugzilla.mozilla.org