A simple service menu for file comparison using kdiff3 in the Flatpak version. It supports comparing files and directories in both 2-way and 3-way modes.

Actions:
Compare each other: Select 2 or 3 files or directories to compare.
Select for compare: Save one or more file/directory paths for future comparisons.
Compare: Compare the selected item with previously saved paths.

Installation:
copy kdiff3_servicemenu.desktop file to ~/.local/share/kio/servicemenus/