I'm using Linux Mint 18.1 x64 Cinnamon. The fonts in Facebook look really ugly in Google Chrome. Firefox has no issues with it though. Here's a comparison:
How do I fix the font rendering in Chrome?
Apparently this issue is caused by Chrome not being able to replace the Helvetica font with the proper alternate font when the ttf-mscorefonts-installer package is installed in the machine. I solved the issue by completely removing the ttf-mscorefonts-installer package using the following command:
sudo apt-get remove --purge ttf-mscorefonts-installer
A restart after running the above command, the fonts came back neat and cool again.
