Hi cute..
Try this...
To get your bookmarks menu back:
Click on the menu item View, Mouse over "Toolbars" and make sure that "Bookmarks Toolbar" is checked.
If you encounter strange problems relating to bookmarks, downloads, window placement, toolbars, history, or other settings, it is recommended that you try creating a new profile and attempting to reproduce the problem before filing bugs. Create a new profile by running Firefox with the -P command line argument, choose the "Manage Profiles" button and then choose "Create Profile...". Migrate your settings files (Bookmarks, Saved Passwords, etc) over one by one, checking each time to see if the problems resurface. If you do find a particular profile data file is causing a problem, file a bug and attach the file.
from here http://www.mozilla.com/en-US/firefox/3.0.2/releasenotes/
and if you like to Recover Your Firefox Bookmarks here we go.-
This is documented elsewhere, but perhaps comes across as too nerdy for some. If you’re using Windows XP, recovering from a crash or whatever, and find that your Firefox bookmarks (and bookmarklets and bookmark toolbar) have disappeared, here’s what to do:
* Close Firefox if it's running.
* Find your profile in c:\Documents and Settings\[your XP user name]\Application Data\Mozilla\Firefox\Profiles
* There should be a subfolder there called bookmarkbackups. Find the most recent bookmarks html file in there (usually with a date after the ‘bookmarks’ bit.
* Copy it to somewhere safe and rename the existing one bookmarks.html.
* Copy it to the default profiles folder (up one level from the bookmarkbackups folder, deleting the existing bookmarks.html file.)
* Close Firefox if it’s running and launch it. Your old bookmarks should be restored.
(And, while I'm at it, here's a solution if your Firefox browser refuses to remember any of your changed settings in toolbars etc when you close it, resetting everything back to what it was before. The same bug -- likely to be fixed soon -- also deletes your search engines in the search box to the right of the address box. This fix will fix both problems:
* Locate the localstore.rdf file in the same place as above.
* Delete it.
* Restart Firefox. You should be good to go.
If that didint solved your problem..
check here-
1. http://support.mozilla.com/en-US/kb/Lost+Bookmarks
2.US/kb/Bookmarks+and+toolbar+buttons+not+working+after+upgradin
Hope this helps for you...
Gud luck...
Cheers!!!!!