Firefox4 Ignores DPI

Dominic Fandrey kamikaze at
Thu Mar 24 01:58:30 UTC 2011

Firefox4 ignores both the system DPI setting and its own preference
layout.css.dpi. Instead Firefox4 renders everything as if the
screen had 96DPI.

Here you can view the DPI used by your browser:

I have submitted a fix to

The patch can be dropped into www/firefox/files/ as is. I would
appreciate feedback.


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