I just had this strange thing start happening recently. I don't know if an update caused it.
Many sites and extensions now have Roboto Condensed as their font. For instance, the Google Translate extension, and many other websites that did not use it before (i.e. https://forum.unity.com/forums/editor-general-support.10/).
This wasn't happening before about a few days ago. It's a little bothersome as many fonts are clashing now.