Do you mean on the classic menu bar? (File, Edit, View...) To display the menu bar, you can use any of these methods:

• right-click a blank area of the tab bar > Menu Bar
• right-click the "+" button on the tab bar > Menu Bar
• tap the Alt key to activate the classic menu bar, then View > Toolbars > Menu Bar
• click the "3-bar" menu button and use Customize to access the Show/Hide Toolbars list

If you meant on the toolbar, the icon changed in Firefox 29. You should find a star, and next to it, something that looks like a clipboard. It's that button on the right which drops down your Bookmarks menu list from the toolbar.

Any luck?

See also:

• https://support.mozilla.org/kb/how-do-i-use-bookmarks