Answer by dmnc for Chrome 33 shows ugly, blocky, pixelated fonts in Linux

I don't want to disable bitmap fonts by enabling 70-no-bitmaps.conf, because I'm using them in the xfce4-terminal (i.e. Fixed font). So I've found the solution in 29-replace-bitmap-fonts.conf

/etc/fonts/conf.avail/29-replace-bitmap-fonts.conf:

<?xml version="1.0"?><!DOCTYPE fontconfig SYSTEM "fonts.dtd"><fontconfig><!-- Replace generic bitmap font names by generic font families.         These font-families will get replaced by other rules and         default to scaled ones. --><match target="pattern" name="family"><test name="family" qual="any"><string>Helvetica</string></test><edit mode="assign" name="family"><string>Arial</string><string>Liberation Sans</string><string>sans-serif</string></edit></match></fontconfig>

And then I've enabled this config:

ln -s /etc/fonts/conf.avail/29-replace-bitmap-fonts.conf /etc/fonts/conf.d/29-replace-bitmap-fonts.conf

For Gentoo users:

eselect fontconfig enable 29-replace-bitmap-fonts.conf