On installation of Google Chrome through the Third Party Repository the fonts in Chrome are not correctly set. When opening the browser for the first time all fonts are set as "custom" and serifyied.
After installation they have to be manually set to Noto Sans or Clear Sans (the Firefox one) and Hack for the fixed-width one in order to get a correct rendering.
It looks to me as if sans-serif fonts like Helvetica, Arial and thelike are just being rendered as a serif font which looks like good old Times New Roman. I tested this on several websites and looked at their respective stylesheets. The behaviour is reproducible.
Fonts are:
These work correctly if you have mscorefonts installed.
I installed mscorefonts following this http://www.fosslinux.com/1387/how-to-install-microsoft-true-type-fonts-in-solus.htm.
Now most of the fonts work again (google.com etc.).
The most annoying that this doesn't fix is when I look at the source of a website. Inspector tells me it's monospace font.
They broke font config reading (we don't put it in /etc/fonts but rather /usr/share/fonts) in Chromium, which affects Vivaldi / Vivaldi Snapshot as well. We're opting for a symlink in fontconfig, will work on it now.