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

control key zoom without + or -

  • 2 replies
  • 2 have this problem
  • 5 views
  • Last reply by cor-el

more options

When I press the CTRL key on a PC the browser zooms in - this is without the + or - modifier

When I press the CTRL key on a PC the browser zooms in - this is without the + or - modifier

All Replies (2)

more options

Hello jgieschen,

Holding down the Ctrl key and rotating the mouse wheel might be why this is happening.

Would you try this please :

Type in the address bar about:config and press Enter (promise to be careful, if asked)

Type in the search bar mousewheel.with

Look for the preference mousewheel.withcontrol.action

and set its value to 1

Then close and restart Firefox.

Any luck  ?

If not : change the value back to its default (which is 3).

more options

Did you try to reboot the computer?

Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.