Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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.

Switches unwanted to full-screen

  • 3 replies
  • 1 has this problem
  • 1 view
  • Last reply by ideato

MoosePa
MoosePa
more options

Quite often when I start typing in the Location bar or Search bar a drop down menu opens (for example File) and the Firefox window changes to full-screen mode. What's the reason for this annoying behaviour and – what is more important to me – how can it be fixed?

Quite often when I start typing in the Location bar or Search bar a drop down menu opens (for example File) and the Firefox window changes to full-screen mode. What's the reason for this annoying behaviour and – what is more important to me – how can it be fixed?

All Replies (3)

ideato
ideato
more options

Click F11 in keyboard


thank you

MoosePa
MoosePa Question owner
more options

Thanks. I know how to toggle using F11 (=wanted toggle). My problem is the unwanted toggle and focus switch.

ideato
ideato
more options

See if this happen in Safe-mode , if this is not happen then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.

Use "Disable all add-ons" on the Safe Mode start window to disable all extensions.


Troubleshooting extensions and themes



thank you

Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.