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Why is there blank space showing desktop background above and below my browser window? How to fix this?

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I recently installed Firefox on a new PC and this latest version shows either the desktop background or the content of the open window behind my browser above and below the browser window, to the right of the menu bar and tabs. This is something I've never seen before and it's annoying. I want things back the way they were, when my entire screen was browser window, except for the button bar at the bottom of the screen. I tried the factory reset, no help. Tried full screen. Not what I want. How do I get rid of these window backgrounds around the browser?

I recently installed Firefox on a new PC and this latest version shows either the desktop background or the content of the open window behind my browser above and below the browser window, to the right of the menu bar and tabs. This is something I've never seen before and it's annoying. I want things back the way they were, when my entire screen was browser window, except for the button bar at the bottom of the screen. I tried the factory reset, no help. Tried full screen. Not what I want. How do I get rid of these window backgrounds around the browser?

All Replies (3)

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Try to disable transparency in Windows.

Right click in a free space on your desktop.
Left click on Personalization.
There are four options at the bottom of the screen, choose "Window Color and Appearance".
Select a border color
Uncheck: "Enable transparency"

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Hi,

Thanks for the information. Didn't fix my problem, it just enabled me to change the color of the background. I still see the background above and below the browser window. Any other ideas that might fix the problem?

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Is there a problem with the maximize function? Firefox should fill the screen if you click the maximize button.

If it doesn't, maybe it's running with some odd settings in your Firefox shortcut, or another unusual startup configuration (e.g., sandboxing software).