Random problems with copypaste and context menus.
 

Hello.

I am at the moment on Ubuntu Studio 16.04 LTS 64-Bit.

There are some random problems that occured, that may be linked to each other:

• I am unable to move any tabs with Firefox.
• I am unable to paste from my clipboard.
• I am also unable to paste from the clipboard in other applications than Firefox.
• Firefox: Right clicks do not display context menu.
• Firefox download/setting menu click: Menu just shows up for the fraction of a second and then vanishes.

Is that cause known? And how can it be solved without violating the Linux/BSD philosophy of restartlessness?

Copypaste suddenly works.
 

The copypaste issue mysteriously solved itself while I was just browsing a bit with Firefox.
I would still be interested in the possible cause.

how did you install firefox?
hint: 'apt install firefox' is the proper way.