#Chromium landed support for fractional scaling on #Wayland a couple of days ago. It was reverted again today. Reason for revert: This change completely broke Chromium Ozone/Wayland on compositors that support fractional-scale-v1.

Nobody had ever tested it and the authors missed the whole actual scaling part with wp_viewporter.

Anyhow, here's a working initial patch for #Firefox:
bugzilla.mozilla.org/show_bug.…