lost bar containing mail, bookmarks, etc

http://support.mozilla.com/en-US/kb/Menu%20bar%20is%20missing http://support.mozilla.com/en-US/kb/how-do-i-customize-toolbars http://support.mozilla.com/en-US/kb/Back%20and%20forward%20or%20other%20toolbar%20items%20are%20missing and make sure that you do not run Firefox in full screen mode. thank you Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.