[[Firefox does not ask to save tabs and windows on exit|This mozilla support article]] should guide you through saving your tabs when you quit.

Please update Firefox to the latest version via "Help > Check for Updates or Help > About Firefox" The Firefox 3.5.8 version that you use is no longer maintained with security and stability updates.<br /> Using unsupported Firefox versions is at your own risk and makes you vulnerable to attacks. *http://en.wikipedia.org/wiki/Vulnerability_(computing) *http://www.mozilla.org/security/known-vulnerabilities/ *https://support.mozilla.com/kb/Installing+a+previous+version+of+Firefox *Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html *Firefox 3.6.x: http://www.mozilla.com/en-US/firefox/all-older.html ---- Your above posted system details show outdated plugin(s) with known security and stability risks that you should update. *Shockwave Flash 10.0 r42 Update the Flash plugin to the latest version. *https://support.mozilla.com/kb/Managing+the+Flash+plugin *http://kb.mozillazine.org/Flash *http://www.adobe.com/software/flash/about/ Update the Java plugin to the latest version. *https://support.mozilla.com/kb/Using+the+Java+plugin+with+Firefox *http://kb.mozillazine.org/Java *http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)