Start Firefox in Diagnose Firefox issues using Troubleshoot Mode 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

Tried your suggestion and evidently it is not an extension problem. Any other ideas? I noticed another person had the same problem. I wonder if they resolved theirs?

Are you saving the Bookmarks in the Firefox Bookmarks Manager (Library) or on a website (e.g. Yahoo!) ?

• https://support.mozilla.com/kb/how-do-i-use-bookmarks

• http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox

I am saving to Yahoo. Just read where they are upgrading the site and you cannot save new bookmarks until the end of the month. Sorry for the inconvenience I caused. Never received anything from Yahoo about this upgrade. Thanks for your time and trouble.