This is quite old story however I could not find an answer:
How to completely disable KDE Plasma 5 (ver 5.16) clipboard?

I don't want to remove clipboard app from the tray, I would like to completely disable it.

Thank you

I think that that clipboard is a X.org thing - only that KDE4, Plasma5 or XFCE make its usage more convenient.

Anyway, I do not see why someone would want to disable it.

You can disable the klipper widget (Plasma 5's clipboard widget) by right clicking the system tray (the drop down menu arrow on taskbar)>>Configure system tray>>Deselect "Clipboard" from the General settings page (according to the manual in /usr/doc/HTML/en/klipper).

This will remove the klipper widget and stop it from saving further clipboard history in $HOME/.local/share/klipper. The cut/paste function and xclipboard will still work with the widget disabled. You probably dont want to disable that kind of core function altogether and would be out of the scope of Plasma 5.

..and I don't see why would you comment if you have nothing constructive to add?

thank you though

Thank you,
this is what I needed. In past disabling widget did not work:
I could disable klipper, use copy/paste enable klipper and all copied entries were still visible.
Unfortunately this feature of klipper (ability to preserve ad reuse of copied data) affected some functionality of waterfox.
Leaving X only cut/paste functionality do not interfere with waterfox