Mattia, thanks for this. Just an FYI for Chrome, there is an issue reported for the fonts, installing chrome · Issue #422 · clearlinux/distribution · GitHub, once I applied the workaround my fonts were fine.
Edit the file /etc/environment with root privileges:
$ sudo vi /etc/environment
Add the following:
export FONTCONFIG_PATH=/usr/share/defaults/fonts
and save the file and reboot to the system.
I also added chrome to my favorites since I use it all the time. Right-click the chrome icon and select add to favorites.
Your fonts should behave