On my system, I drag the icon at the left end of the Location/URL/Address bar to the bookmarks toolbar, an empty dot-outlined square appears in the bookmarks toolbar where the favicon would be, I then click the item on the bookmarks toolbar to load it and the favicon appears. Remember that a a few/some sites do not supply a favicon. (The favicon was removed from the Location bar, in part, as a security measure because it was too easy for malicious websites to fake the favicon).

Other - Check your Plugins and update as needed.

1. Check your Plugins - https://www.mozilla.org/en-US/plugincheck/
2. Java - https://support.mozilla.org/en-US/kb/use-java-plugin-to-view-interactive-content

You should also be able to drag the tab from the tab bar on the Bookmarks Toolbar to bookmark this tab.

Neither of these solutions have worked.

Make sure that toolbars like the "Navigation Toolbar" and the "Bookmarks Toolbar" are visible:

• Firefox > Options
• "View > Toolbars" (press F10 to display a hidden menu bar)

Open the Customize window to set which toolbar items to display:

• Firefox > Options > Toolbar Layout
• View > Toolbars > Customize

• Check that "Bookmarks Toolbar items" is on the Bookmarks Toolbar
• If the "Bookmarks Toolbar items" is not on the Bookmarks Toolbar then drag it back from the toolbar palette in 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 set up

You can check for problems with the localstore.rdf file.

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

Restoring the default set seemed to work. Thanks!