In Firefox 29 and Firefox 30: "3-bar" menu button > Customize In the lower left, click the Title Bar button to switch the title on and off. In Firefox 28, I actually can't remember! ---- I would be remiss if I didn't remind you: * Firefox 28 is not secure: Mozilla has disclosed its [https://www.mozilla.org/security/known-vulnerabilities/firefox.html known security flaws]. * You can modify Firefox 30 to restore many of the UI features of earlier versions of Firefox using the techniques in the following article (and/or with assistance from forum volunteers): [[How to make the new Firefox look like the old Firefox]].

thank you very much. problem solved.