When I started my computer this morning, all the navigation buttons, home, bookmarks, reload etc. are missing from the toolbar at the top of the FF screen. The 'Restoring Default Toolbar set' option does not work because right clicking does not open the Customize dialog box. I have tried regressing to an earlier restore point which did not resolve the problem. I have attached a screen shot. Any help would be much appreciated, except for suggestions to install the latest version of FF. :) I am quite happy with version 28, thank you very much.