I just understood the problem!
It dawned upon me! All these apps are united by the fact that they have
icons (when they running) at notification area on xfce4-panel.
Problem with xfce4-panel! I checked it.
If I make
$ rm -rf .config
and then logon to xfce4 it tell me 'Welcome to the first start of the panel'
and I choose 'Use default config'.
Now all works very good,
But if I make logout and then relogon to xfce4 again opera and some apps
Ok. Reboot system. Logon to xfce4 and first thing remove 'notification area'
from xfce4-panel. And now all works fine!
Problem in xfce4-panel.