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session is not restored

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When I close the browser, a pop-up window appears that the tabs will now be closed. When you open the browser again, the last tabs are not restored despite the fact that the flag is set in the settings to open previous tabs and windows

When I close the browser, a pop-up window appears that the tabs will now be closed. When you open the browser again, the last tabs are not restored despite the fact that the flag is set in the settings to open previous tabs and windows
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To enable session restore to function properly, do not close any open windows. Instead, quit Firefox using the Firefox menu option which is on top right corner(Firefox menu option -> Exit).

If the feature of "Clear history when Firefox closes" has been enabled just in case,

  • Avoid deleting the browsing history.

(Firefox menu option -> Settings -> Privacy & Security -> History -> uncheck the checkbox of "Clear history when Firefox closes")