The post does mention that it was possible already to build your own Firefox for Wayland, and that's what Fedora does. The point is that the “official” package from mozilla.org now supports Wayland out-of-the-box :)

The Fedora package is being built by exactly the same guy (Martin Stransky from Redhat), who works on implementing Wayland into Firefox.

It is not for the first time, that Fedora package had something enabled before the upstream package did: CSDs went the same way.

Thank you for the precision :)

Did you have any problems with copy-paste? For me copy-paste was completely broken.

Yes, copy/paste between Firefox (on Wayland) and other apps was broken but was fixed in firefox-63.0.1-5.fc29.[1][2]

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1585393

[2] https://bodhi.fedoraproject.org/updates/FEDORA-2018-2d42997a...

Copy-paste works, but primary selection does not, it was added to wayland-protocols just few days ago. Drag-and-drop also seems to be broken, I cannot drag urls to the terminal, for example.

Hmm, a few weeks ago Ctrl-C Ctrl-V didn't even work on Fedora 29. With the latest Nightly everything seems to work fine on Wayland, even dragging a URL to GNOME Terminal.

Also, without XWayland I have no artifacts when scrolling fast in long documents. Very nice :-)