This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Won't Open Windows in Multiple Monitor Environment

  • 6 replies
  • 1 has this problem
  • 1 view
  • Last reply by m2528

m2528
m2528
more options

I have a 6-Core Mac Pro and have three DVI monitors hooked up to it. If I have the front-most Firefox window on the main screen, everything works fine. If I drag it to a side monitor (Monitor 2 on left, monitor 3 on right), then try to open a new window (from the menu or by dragging a tab to another monitor), it won't work. If I try it enough times, Firefox starts acting strange and I have to quit and restart Firefox.

I am using Mac OS 10.6.8 and Firefox 7.0.

I have a 6-Core Mac Pro and have three DVI monitors hooked up to it. If I have the front-most Firefox window on the main screen, everything works fine. If I drag it to a side monitor (Monitor 2 on left, monitor 3 on right), then try to open a new window (from the menu or by dragging a tab to another monitor), it won't work. If I try it enough times, Firefox starts acting strange and I have to quit and restart Firefox. I am using Mac OS 10.6.8 and Firefox 7.0.

All Replies (6)

m2528
m2528 Question owner
more options

Still same issues - Now using Firefox 7.0.1 and Mac OS 10.7.2. Windows show up on the menu bar under "Windows", but when I select a particular window, it won't appear - same with the Downloads window.

Anyone else have this problem - or anyone have a solution?

Jim

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Does it work with hardware acceleration disabled?

  • Firefox > Preferences > Advanced > General > Browsing: "Use hardware acceleration when available"
m2528
m2528 Question owner
more options

Yes, it does. Thank you. Do you kn0w why that is?

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Hardware acceleration doesn't seem to work very well with multiple monitors. I've seen issues reported on Windows as well with such a setup and on Mac it seems to prevent Firefox windows from opening on the second (i.e. not first) monitor.

m2528
m2528 Question owner
more options

Awesome - thanks for the info.

Jim

m2528
m2528 Question owner
more options

Firefox 7.0.1 is doing it again - when using left monitor, it won't open new windows or downloads window. Hardware acceleration is still off.  :(

I looked at bug fixes for 8.0, but it doesn't say anything about fixing this. I'm about to upgrade it to see if this fixes it (crossing fingers).

Jim