@forteller #AppImage support is still done on a per-distro basis, and it really isn't much more than setting permission and executing certain environment variables... I think.
But mayhaps this is a job for ... #FREEDESKTOP
Hello. I'm free desktop... gief money,
We craves it, WE NEEDS IT!!
But yeah, maybe xdg-open should handle that problem. Then distros wouldn't need to do anything to get first rate AppImage support by removing those annoyances.
One can only hope.