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.

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

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Second Monitor Display Scaling

  • 4 uphendule
  • 1 inale nkinga
  • 2 views
  • Igcine ukuphendulwa ngu sarahrb1989

more options

I am a Mac user and using a second monitor display. When I move a Firefox window to the second display it doubles in size. I cannot figure out how to get it to display properly (as it displays on my original monitor). Please help.

I am a Mac user and using a second monitor display. When I move a Firefox window to the second display it doubles in size. I cannot figure out how to get it to display properly (as it displays on my original monitor). Please help.
Ama-screenshot ananyekiwe

All Replies (4)

more options

It is not that. All my other program windows are scaled correctly when I move them to the second display. It is only Firefox that is doing this.

more options

I’ve already used the about:config to set the main display to 2. If I do it again once I’ve dragged the window over to the second display then it rescales on my main monitor too which I don’t want. I just want the window to be the same scale on BOTH monitors.

more options

I'm on a Macbook Pro from 2012 running 10.13.6 and here are my settings.

Displays: Color LCD:

 Display Type:	Built-In Retina LCD
 Resolution:	2880 x 1800 Retina
 Framebuffer Depth:	24-Bit Color (ARGB8888)
 Main Display:	Yes
 Mirror:	Off
 Online:	Yes
 Rotation:	Supported
 Automatically Adjust Brightness:	No

HP Z27n:

 Resolution:	2560 x 1440 (QHD/WQHD - Wide Quad High Definition)
 UI Looks like:	2560 x 1440 @ 59 Hz
 Framebuffer Depth:	24-Bit Color (ARGB8888)
 Display Serial Number:	CNK7240MFG  
 Mirror:	Off
 Online:	Yes
 Rotation:	Supported
 Automatically Adjust Brightness:	No


What are your settings on your external monitor?

Okulungisiwe ngu jonzn4SUSE

more options

Here are my settings, they are both set to the same resolution.