Use Toolbar Layout (Customize) to open the Customize window and set which toolbar items to display.

  check that "Bookmarks Toolbar items" is on the Bookmarks Toolbar

   if "Bookmarks Toolbar items" is not on the Bookmarks Toolbar then drag it back from the toolbar palette into the Customize window to the Bookmarks Toolbar 

• if missing items are in the toolbar palette then drag them back from the Customize window on the toolbar
• if you do not see an item on a toolbar and in the toolbar palette then click the "Restore Default Set" button to restore the default toolbar setup

• You can check for problems caused by a corrupted localstore.rdf file.

http://kb.mozillazine.org/Corrupt_localstore.rdf

Is everything gone, all customizations, back to default?

In case Firefox performed a reset during your upgrade, can you check your desktop for a folder named Old Firefox Data. If you find one, we can go over how to recover settings from it.

A couple of users recently reported that their bookmarks became invisible. If they type into the address bar enough to match a bookmark, it can be opened and the star in the address bar turns yellow. However, the bookmarks menu, sidebar, and Library dialog are blank. Do you have that issue?

I saw a folder named Old Firefox Data. But it did not contain the bookmarks I had before the upgrade

I saw a folder named Old Firefox Data. But it did not contain the bookmarks I had before the upgrade

Did you look for a bookmarkbackups folder in the "Old Firefox Data" folder on the desktop?

• http://kb.mozillazine.org/Backing_up_and_restoring_bookmarks_-_Firefox

Hi and Thanks Cor-el. My apologies. I didn't find a folder my bookmark file that I can click on and see old old bookmarks I had. And this didn't happen until I upgraded to firefox 26

if you configured the firefox sync option you can recover the bookmarks from any of other devices

Hi & Thanks... But all of my bookmarks were on one device