The problem
In your browser, you may have problems on some websites displaying strange fonts. For example, you may have seen the following fonts on Github.
This problem is due to bitmap font.
Solution
To deactivate bitmap fonts, you can use existing font configuration files you
can find into /etc/fonts/conf.avail. To avoid bitmap fonts, you just need to
link the 70-no-bitmaps.conf into /etc/fonts/conf.d directory.
$ cd /etc/fonts $ ln -s conf.avail/70-no-bitmaps.conf conf.d/
Now, you can restart your X server for this new configuration taking effect.