They have to be here: https://download.opensuse.org/repositories/mozilla/openSUSE_Leap_15.0/x86_64/
But there are no files at all.
Nothing changed for a Tumbleweed: https://download.opensuse.org/repositories/mozilla/openSUSE_Tumbleweed/x86_64/.
Filed a bug: https://bugzilla.opensuse.org/show_bug.cgi?id=1127258.
Am I making a mistake?
Info from an aswer in the bugreport: something happend with an OBS.
Files will be restored (more precisely: rebuilded) within a few days.
More at https://bugzilla.opensuse.org/show_bug.cgi?id=1127258.
Thanks for the update. And yes, filing a bug report was a good move.