SUMMARY My Firefox runs on Xwayland. I can DnD between Firefox and Desktop, but I can't between Firefox and Dolphin. STEPS TO REPRODUCE 1. start Wayland session 2. open Dolphin 2. open Firefox and load the following wallpaper: https://wallpaperaccess.com/full/112752.jpg 3. drag the wallpaper and try to drop it on Dolphin OBSERVED RESULT context menu showing "move/copy/link here" and "Cancel" does not open when you release mouse button on Dolphin EXPECTED RESULT context menu showing "move/copy/link here" and "Cancel" should open when you release mouse button on Dolphin SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux (available in About System) KDE Plasma Version: 5.18 KDE Frameworks Version: 5.67 Qt Version: 5.14.1 ADDITIONAL INFORMATION DnD between Opera browser also running on Xwayland and Dolphin works as expected.
I believe we don't support (yet) DnD between XWayland apps (as firefox) and Wayland apps (dolphin).
Humm, I can't reproduce on Neon unstable edition with Firefox running on Xwayland too. Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.18.80 KDE Frameworks Version: 5.68.0 Qt Version: 5.13.2
cannot reproduce with Plasma 5.20 beta and Firefox 80.0.1. Operating System: Arch Linux KDE Plasma Version: 5.19.90 KDE Frameworks Version: 5.74.0 Qt Version: 5.15.1