I have nothing on my forward / back arrow icons.

Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes). * Don't make any changes on the Safe mode start window. * https://support.mozilla.com/kb/Safe+Mode * https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes ---- Another possible cause is a problem with the file places.sqlite that stores the bookmarks and the history. * http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox