Firefox windows don't move when attempting to drag them via touch under GNOME Wayland. GNOME Wayland has a bug with dragging XWayland SSD windows via touch, but that shouldn't affect Firefox CSD? https://bugzilla.gnome.org/show_bug.cgi?id=774947
In fact dragging the window via touch doesn't work under X either, so this is nothing to do with that GNOME Wayland bug.
Can you please check Firefox 60 Beta [1]? That's target release for this feature, Fedora has only a tech preview in Firefox 59. [1] https://www.mozilla.org/en-US/firefox/channel/desktop/
Any chance you can do a scratch build for F28? ;)
Sorry I don't have a time for that. You can just download the tar.gz, unpack it and run.
Still the same on FF60 final.
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I'm experiencing the same problem described here on a new Fedora 30 installation (out of the box and also after running "sudo dnf update"). Firefox Quantum 68.0. I can move the FF window using SuperKey + arrows, but not with touch-screen drag. Dragging via touch-screen works fine for other programs, such as Settings, gedit & Rhythmbox.