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

My firefox is huge all of a sudden, why?

  • 1 reply
  • 5 have this problem
  • 8 views
  • Last reply by smo

more options

My firefox has been fine, then all of a sudden last night i went ot open it and everything is huge, i goto facebook and the facebook logo is half cut off, the font is huge, and its annoying, how can i fix this?

All Replies (1)

more options

Firefox on Windows is now following display scaling options which may render text larger on high resolution displays. Some users may notice that web pages and the browser UI appear magnified in Firefox 22.

The layout.css.devPixelsPerPx preference handles this and lets you fine tune the size of all fonts and other elements in the browser. Start with the default value of the preference, i.e. 1.0. To reduce the font size, use values between 1.0 and 0.5 (do NOT go too low!), to increase the size of fonts, use values greater than 1.0.

To modify it do the following:

  1. Type about:config into the browser's address bar and tap on the enter key.
  2. Confirm that you will be careful if the warning appears.
  3. Filter for layout.css.devPixelsPerPx.
  4. Double-click the entry and change its value - to default 1.0 for starters

Note that changes take effect immediately. You can right-click the preference and select Reset to set it to its default value again.