This new SIDEBAR that has appeared this morning. It has taken me an hour of my life to get rid of it. I am so exercised I decided to tell you how annoyed I am that it appeared with no simple way to get rid of it. Obviously designed by someone who has never tried working on a small laptop screen where every inch of visual real-estate is valuable.

Fortunately your support site is so full of other people complaining it had a solution that worked for me. I had already tried myself what the support site described as te recommended method then I discovered the "about:config" option and that has removed it. Never to be seen again I hope.