When you click on the link, do they come back? Do you use any extensions that change favicons (Check in Tools > Add-ons)

In Firefox 10, they changed the default favicon from a white page to a empty box and so if you previously had pages, you'll have empty boxes. If you previously had favicons, you may need to load the page for the icons to re-save.

Thank you for responding! I changed my preferences in Favicon, and redid them, and so that problem is solved. However, I still have a few websites that just show an empty box. I would like to just show the company icon logo, but I just see an empty box. For example: my bank, a couple of insurance company's, gas company and some other large company's. I have clicked on these, and opened them, but they do not come back. Any suggestions?

Do some company's not have icons? Or is FF 12 just not showing them??

Try to restore favicons with this extension:

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

A lot of websites don't have favicons. Go to the site and see if a favicon shows up in your tab bar.