on trying to upgrade firefox from v3.0.8 to 3.6.3 the bookmarks menu is missing from the top screen. it is restored when I revert to v 3.0.8
on trying to upgrade firefox from v3.0.8 to v3.6.3 the bookmarks menu at the top of the page with "File. Edit. View .History.Tools and Help has disappeared. It re-appears when I revert to v3.0.8.