We have Firefox 60.0.1 with native Wayland backend at Fedora updates now:
https://bodhi.fedoraproject.org/updates/FEDORA-2018-c0674d672f
https://bodhi.fedoraproject.org/updates/FEDORA-2018-1f788d5c09
https://bodhi.fedoraproject.org/updates/FEDORA-2018-a62434cca8
The Wayland backend is available as an extra desktop entry. Please
report all wayland related issues to #BZ as usually. You should not
notice any changes/regressions at default X11 backend.
Thanks,
ma.