Firefox is customizable. If you prefer the old design, switching back is easy: http://mzl.la/1hIi1xS

Firefox 29 and later versions have the Australis interface that looks different than the user interface in Firefox 28 and older versions. *With the Australis interface the orange Firefox menu button has been replaced by the three bar Firefox Menu button at the far right end of the Navigation Toolbar<br>A consequence of this new menu button is that you no longer can hide the Navigation Toolbar *There is a star like button to the right end of the search bar on the Navigation Toolbar to bookmark the current web page and a "Show your bookmarks" button next to it to open the Bookmarks in a drop down menu.<br>You can find "Show All Bookmarks" to open the Bookmarks Manager (Library) at the bottom of this drop-down list *It is still possible to have the menu bar visible via the right-click context menu on the toolbars to have menus like the Bookmarks menu See also: *https://support.mozilla.org/kb/how-to-make-new-firefox-look-like-old-firefox *https://support.mozilla.org/kb/common-questions-after-updating-to-new-firefox *https://support.mozilla.org/kb/learn-more-about-the-design-of-new-firefox *http://forums.mozillazine.org/viewtopic.php?f=38&t=2824649