The AppImages are designed to be simple. You download one, make it executable, and run it. In Ubuntu, however, there is an extra step: Ubuntu comes with FUSE 3 by default, but some AppImages still require FUSE 2 (libfuse2t64) to run.
AppManager is a new (almost) GTK4/Libadwaita implementation that fixes this particular problem, using AppImages via uruntime instead of FUSE. It handles regular AppImages packaged with SquashFS, as well as newer ones packaged with DwarFS.






