"Open previous windows and tabs" option ignored on startup

Hello, I'm encountering a highly frustrating issue with Firefox. Even though the "Open previous windows and tabs" option is checked in my settings, it is completely ignored on startup. Firefox systematically opens to a blank tab or home page. Here are the key details and what I've already checked: * The Ctrl + Shift + T shortcut works perfectly: This proves Firefox is saving my session and history; it's only the automatic loading on startup that is being blocked. * In about:config, the preference browser.startup.page is correctly set to 3. * My privacy settings are standard: Firefox is set to "Remember history" and the "Clear history when Firefox closes" box is unchecked. I am not in permanent Private Browsing mode. * The Windows shortcut I use to launch Firefox is clean (no forced URL at the end of the target path). * I close Firefox cleanly via the menu, and I've verified that no ghost processes are stuck in the Task Manager after closing. It makes no sense since the parameter is hardcoded but gets bypassed on launch. Is there a specific file (sessionstore or otherwise) that could be corrupted and blocking the automatic load without blocking the manual restore? Thanks in advance for your help, I'm out of ideas! Hopefully, this gets you a fast and highly technical answer. Hang in there! ''Moderator note: This question has been edited to correct the formatting.''