PS I first reported this bug as
https://bugzilla.mozilla.org/show_bug.cgi?id=935314
but Mozilla said
"If you cannot reproduce it with a build from Mozilla, please report it in the Ubuntu bug tracker: https://launchpad.net/ubuntu/+source/firefox/+bugs Thanks."
PS I first reported this bug as
https:/ /bugzilla. mozilla. org/show_ bug.cgi? id=935314
but Mozilla said
"If you cannot reproduce it with a build from Mozilla, please report it in the Ubuntu bug tracker: https:/ /launchpad. net/ubuntu/ +source/ firefox/ +bugs Thanks."