The issue began after update from debian 10 to 11. And it persists in 12.
Before, Vmware Workstation help was shown in default browser (it's an
html guide).
After, guide was not showing anymore. Calling it (click on "help" on
Vmware application) began opening Abiword.
Vmware Workstation has no option "open guide with...".
In kde control panel -> app -> default, Firefox is set as default browser.
If I uninstall abiword, logoff and login to kde, guide is shown in
Firefox. If I reinstall abiword, issue comes back.
Where should I look?