Using scaling causes Firefox fonts in menu and on pages to be blurry
Using Debian sid/unstable with gnome-shell 43.7-1, mutter 43.6-1 and firefox 116.0-2, and enabling fractional scaling with
gsettings set org.gnome.mutter experimental-features "['scale-monitor-framebuffer']"
and then selecting 150 %, the fonts of the GNOME programs, like Evolution, are rendered sharp, but the fonts in Firefox look a little blurry.