Force Firefox To Use Windows Vista ClearType Fonts

Force Firefox To Use Windows Vista ClearType Fonts

Windows only: Reader Anonymous writes in with an interesting tip for making the web a more readable place—by forcing Firefox to use Windows Vista fonts, even on XP.

The directions are simple and easy to follow, resulting in Firefox ignoring the fonts picked by web pages and using only the high-quality Windows Vista fonts that you’ve specified. If you are running XP you still have access to the fonts by downloading the free Powerpoint Viewer from Microsoft.

His instructions are the following:

  1. If using Windows XP, Install Powerpoint Viewer 2007 in order to install the new fonts.
  2. If using LCD display: Enable Cleartype, by downloading the Cleartype tuner powertoy from Microsoft.
  3. In Firefox: Tools -> Settings -> Content -> Fonts & colours -> Advanced, enable the following settings:
    Proportional: Sans serif size: 16
    Serif: Cambria
    Sans-serif: Corbel
    Monospace: Consolas Size: 14
    Minimum font size: 14

You can tweak the fonts and settings to fit your own preferences, although you should note that most web sites will look significantly different—it’s not a change for everybody or even necessarily recommended, but it’s useful to have the option.Thanks, Anonymous!

For more readability goodness, you can use the Readable App bookmarklet to format pages for easier reading or check out our feature on killer typography tools and free font downloads.


  • For people that have changed it and now want to change it back, here are the default Firefox settings:

    Proportional: Serif size: 16
    Serif: Times New Roman
    Sans-serif: Arial
    Monospace: Courier New Size: 13
    Minimum font size: None

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