I use Firefox 10 on Ubuntu 12.04, in KDE.

In for instance Chrome and Konqueror, the fonts look alright, but in Firefox the fonts are tiny, almost too hard to read.

  • 1
    Did you accidentally change the page zoom? Try View > Zoom > Reset or Ctrl+0.
    – iglvzx
    Mar 6, 2012 at 19:20
  • No, good tip though, didn't know about Ctrl + 0! @iglvzx Mar 7, 2012 at 8:20
  • 1
    Go to chrome://browser/content/preferences/fonts.xul ... What do you see there? The font size should be 16 for proportional and 12 or 13 for monospace.
    – iglvzx
    Mar 7, 2012 at 18:41

2 Answers 2


There are two common cases for the fonts appearing too small in Firefox.

Case 1:

You may have accidentally changed the page zoom. Set the page zoom back to 100% by pressing Ctrl+0 or using the GUI: View > Zoom > Reset.

Note: There is a related preference in about:config for remembering page specific zoom levels. If you do not care for this feature, or frequently change the zoom level by accident, you can set the following to false:


Now when you go back to a page, the zoom level will be reset to 100%.

Case 2:

Your Firefox profile's font settings may have been altered. Go to:


The font size should be 16 for Proportional and 12 or 13 for Monospace.

Note: These settings can also be reached under:

Preferences/Options > Content > Fonts & Colors > Advanced

firefox (72) can't find "chrome://browser/content/preferences/fonts.xul"... Preferences/Options > Content > Fonts & Colors > Advanced is meant for web pages, not for tab or bookmark fonts...

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