After Firefox went haywire every time I tried to upload a file or add an attachment to an email, I eventually found a way to "restore default settings". That fixed ONE problem but immediately caused several new ones: The "File Edit History etc" toolbar has disappeared. How do I get it back? The colours and identifying icons in the drop-down tab menu on the right have also disappeared. How do I get them back? Nowhere to recover them in Settings and no answers to the questions from Mozilla.  :-(