I have stumbled across these which appear to me to be related to the issue I brought to your attention: https://hacks.mozilla.org/2020/08/changes-to-samesite-cookie-behavior/ https://bugzilla.mozilla.org/show_bug.cgi?id=1617609 I have added our SM web address to the 'network.cookie.sameSite.laxByDefault.disabledHosts' setting in FF. I will report if the logouts continue or not following this change. -- *** e-Mail is NOT a SECURE channel *** Do NOT transmit sensitive data via e-Mail Unencrypted messages have no legal claim to privacy Do NOT open attachments nor follow links sent by e-Mail James B. Byrne mailto:ByrneJB@xxxxxxxxxxxxx Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3 ----- squirrelmail-users mailing list Posting guidelines: http://squirrelmail.org/postingguidelines List address: squirrelmail-users@xxxxxxxxxxxxxxxxxxxxx List archives: http://news.gmane.org/gmane.mail.squirrelmail.user List info (subscribe/unsubscribe/change options): https://lists.sourceforge.net/lists/listinfo/squirrelmail-users