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Cannot turn on "Open previous windows and tabs" in version 104.0.2

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Windows 11 Pro 64bit, v.22000. All of a sudden, Firefox goes haywire. Latest is I cannot turn on Open previous windows and tabs in version 104.0.2. The checkbox is simply grayed-out. WHY??? I didn't make any changes - these problems just started on their own. Also, none of my passwords for various websites are automatically available anymore.

Windows 11 Pro 64bit, v.22000. All of a sudden, Firefox goes haywire. Latest is I cannot turn on Open previous windows and tabs in version 104.0.2. The checkbox is simply grayed-out. WHY??? I didn't make any changes - these problems just started on their own. Also, none of my passwords for various websites are automatically available anymore.

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Could you make sure your Firefox is not set to run in Automatic Private Browsing mode. That is set on the Settings page, Privacy & Security panel, History section.

While you're there, if you have Firefox set to clear history when it closes, use the Settings button to verify that it is NOT removing Browsing & Download history, since that also will clear session history (open tabs).