Firefox does not shut down properly

[carlosdanger]

Hi,

I am using Linux Mint 16 - Petra.

Quite often Firefox does not shut down when I close it. No FF-window is visible but when I later start FF, it tells me that an instance is already running. And indeed when I look in the process manager it is still there. I have to manually kill it before I can start FF.
Even worse, sometimes the FF browser which doesn't exit properly uses some CPU as I can check in the process manager.

[Flemur]

- Any messages if run from command line?
$ firefox
- Have you tried it in "Safe Mode"? (no add-ons).
$ firefox -safe-mode

[karlchen]

<mod> davking's post about the old problem happening on mint 21 is over there: viewtopic.php?f=47&t=166169 </mod>