I opened a bug report here:
https://bugzilla.redhat.com/show_bug.cgi?id=1894700

Firefox icons are missing from application launcher after upgrade.  I tried
erasing .local, .kde and .config directories and starting from scratch, but that didn't work.

The other application this is affecting is amule from the rpmfusion repo.

I also tried deleting and re-installing both firefox and amule... that didn't help either.

Is this a kde issue or an application packaging issue?

Since Fx is involved, I would think that more people would be howling about it if it were pervasive, so possibly something got smurfed in my kde configuration during the upgrade, but I would have thought doing the steps above would have corrected... so I must be missing something, but don't know what that would be.

Thanks!