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Firefox loses previous windows and tabs between sessions

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I have MozillaFirefox-140.4.0-150200.152.207.1 on OpenSuse Leap 15.6. In my "Settings" under General and Startup I have always had the option "Open previous windows and tabs" checked.

This just started happening recently. After the first time it happened, I restored everything by searching through "History" and recreating the tabs and windows. Everything seemed OK for a few days then it happened again.

I have MozillaFirefox-140.4.0-150200.152.207.1 on OpenSuse Leap 15.6. In my "Settings" under General and Startup I have always had the option "Open previous windows and tabs" checked. This just started happening recently. After the first time it happened, I restored everything by searching through "History" and recreating the tabs and windows. Everything seemed OK for a few days then it happened again.

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