Workaround suggestion for comment #11:
The only workaround that has worked for me is to use Gnome Classic (no effects) desktop environment, making sure that no compiz processes are started. I am running a similar environment (12.04.5 LTS, 3.13.0-79-generic, nvidia 340.96).
Reference the discussion thread for Firefox at https://bugzilla.mozilla.org/show_bug.cgi?id=1194358 -- Firefox seems particularly susceptible to this issue.
Workaround suggestion for comment #11:
The only workaround that has worked for me is to use Gnome Classic (no effects) desktop environment, making sure that no compiz processes are started. I am running a similar environment (12.04.5 LTS, 3.13.0-79-generic, nvidia 340.96).
Reference the discussion thread for Firefox at https:/ /bugzilla. mozilla. org/show_ bug.cgi? id=1194358 -- Firefox seems particularly susceptible to this issue.