Comment Additional Context... (Score 1) 1124
Just as more context as I couldn't believe it myself : https://wiki.mozilla.org/Firefox/Sprints/Windows_Theme_Revamp/Direction_and_Feedback#Hiding_of_the_Menubar
However this is a dumb move ... For me, the ribbon bar is a non-intuitive piece of eye-candy which does not serve any purpose other than to assist in confusion.
Then again - I'm old school.