Of course one should avoid using the originally provided GTK software under KDE, as it’s also spamming the app drawer.
It should work the same as for the Ubuntu -> Kununtu transition: Install some KDE Plasma desktop metapackage, logout and login using KDE, then remove the libgtk* packages to uninstall the Mate/Cinnamon desktop and it’s associated applications. One can reinstall the desired packages, e.g. Firefox, Thunderbird, Synaptic, afterwards.
Yes, from the Mozilla PPA. One may also want to prevent
snapd
from being installed again by pinning it with a sufficiently low negative priority.Credit to whom credit is due @fmstrat@lemmy.nowsci.com
https://lemmy.nowsci.com/comment/14911535