We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

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

more options

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?

All Replies (2)

more options

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"
more options

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.