Try to recover them with this extension:

• CheckPlaces: https://addons.mozilla.org/firefox/addon/checkplaces/

• Bookmark Favicon Changer: https://addons.mozilla.org/firefox/addon/bookmark-favicon-changer/

GO TO: https://support.mozilla.org/en-US/kb/latest-firefox-issues#os=mac&browser=fx9

Icons missing in the Bookmarks menu

Icons (favicons) for bookmarks in the Bookmarks menu may be missing after updating to Firefox 9. To restore them:

   In the Location bar, type about:config and press Return.
       The about:config "This might void your warranty!" warning page may appear. Click I'll be careful, I promise!, to continue to the about:config page. 
   In the filter section type, image.mem.decodeondraw
   Double-click the entry that results to change it's value to "False"

   Close the tab 

Quit and Restart

I tried the about:config suggestion and it did nothing. Thank you anyway for trying. I noticed when I visit a site I have bookmarked the favicon is restored so it looks like the Check Places Add-on listed above may do a good job of restoring all gazillion of them. Thanks again.

"about:config" solution worked a treat. Thanks!

No one has a concrete way of getting back your bookmarks.. Does Firefox have a team of people that can answer this question?

Since the thread owner has marked the issue as "solved" I'm locking this thread.

shizloc, you asked for a concrete way of getting back your bookmarks. Check the Recover lost or missing Bookmarks article. For lost bookmark icons on Mac OS, See Latest Firefox issues.

If you (or anyone else) still have questions please start a new thread. You can use this link as a starting point: https://support.mozilla.org/en-US/questions/new