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Firefox toolbar text size & icons too small


Hello Firefox Help:

I have Windows 7 Home Premium with Firefox 3.6.13.

The icons and text is far too small in my toolbar. I used the add-on "Theme Font & Size Changer" and it helped with the text. However, all of icons are too small.

I recall this being a problem with Windows XP Media Center 2005. Is this a "bug" with Firefox and Windows 7?

How do I change the size of the icons?

Thanks, k

Additional System Details

This happened

Every time Firefox opened

This started when...

Upon installation

Installed Plug-ins

  • Default Plug-in
  • Shockwave Flash 10.1 r102
  • Adobe Shockwave for Director Netscape plug-in, version
  • Next Generation Java Plug-in 1.6.0_23 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • 4.0.51204.0
  • Adobe PDF Plug-In For Firefox and Netscape "9.4.1"


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20101203 Firefox/3.6.13

More Information

Used "Theme Font & Size Changer" to help with the text but it will not increase the size of the icons.

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3197 solutions 24403 answers

View > Toolbars > Customize
At the bottom left, is Use small icons check-marked?

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10756 solutions 96800 answers

Increase the String pref layout.css.devPixelsPerPx from 1.0 to 2.0 in 0.1 steps to see what works best.
In current Firefox versions this pref is a String value parsed to a float and allows to fine tune the dimensions of all elements (user interface and web pages) more precisely.

See also http://kb.mozillazine.org/about%3Aconfig

If the content on websites needs to be adjusted after changing prefs then you can look at NoSquint or Default FullZoom Level.