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Why does Firefox Mac in full screen on second monitor still have an empty bar along the top of the screen?

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In Mavericks when Firefox 28 or 29 is full screened on a secondary display, there's still an empty bar when the OS menubar auto-hides. Seems like this is a bug, no?

In Mavericks when Firefox 28 or 29 is full screened on a secondary display, there's still an empty bar when the OS menubar auto-hides. Seems like this is a bug, no?

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cor-el
cor-el
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You can try to disable hardware acceleration in Firefox (you need to close and restart Firefox).

  • Firefox > Preferences > Advanced > General > Browsing: "Use hardware acceleration when available"
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No difference. I think it has more to do with Maverick's putting a menu bar on both screens and Firefox not handling it in all cases.