How can I restore my closed tabs when I have no sessionstore.bak?

I recently lost my session that had a lot of tabs (Version 20.0.1).

I have "Show my Tabs from last time" checked. A system crash do to a thunderstorm caused the computer to shut off. When I loaded it back up, I had no tabs, only the Mozilla homepage.

I have no sessionstore.bak and had restored the Mozilla files in Program Files (x86), AppData/Local and AppData/Roaming. My sessionstore.js is not doing anything to my tabs. I restored it to last night. Should I restore it to days prior or is there another solution to get my tabs back? I'd rather not start from nothing again.

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