How to Fix Default Fonts Problem on Firefox
Most of the websites are using Helvetica as an alternative font, and Ubuntu is trying to set Nimbus Sans as a similar font even you have Helvetica font. Also, the default font on Firefox is DejaVu Sans, but the default fonts are working just if the styles don’t specify a font family in a website. Nimbus Sans comes with fonts-urw-base35 package, and it’s ubuntu-desktop’s dependency, direct or indirect. I need ubuntu-desktop to use GNOME, so the best solution here is to disable the font altogether and refresh the fonts cache. ...