i rarely use firefox, but i do use it for a couple of the add-ons ... like user agent switcher and firebug
but today they have all gone! also some rediculous new features have been included - like if i open a new tab - adverts show(eg 'suggested' sites) ... easily switched off but all the same.
my menu bar also disappeared - yes i've restored it
has firefox become a joke - or am i missing the point.
[i seem to have firefox 42.0]