Lets see what you have in the folder in your profile folder call sessionstore-backups. see screenshots of mine Post a screenshot of you files. In the browser go to about:support the then click on the link to open your profile folder. see 3rd screenshot

this is the folder.

Here's info about the files in the folder. https://support.mozilla.org/en-US/questions/1415643 https://support.mozilla.org/en-US/questions/1449521

From the files in your screenshot. With Firefox closed, you will see a file called sessionstore.jsonlz4 in your profile folder. This is your current session that I guess is not the one you want. Just rename it to something like old_sessionstore.jsonlz4_old. Then from your sessionstore-backups folder make a copy of one of the files from the screenshot I attached. Then rename that file sessionstore.jsonlz4 and the move it into your profile folder. Then open Firefox and it should be the session from the date of 1 of those 3 files that I show from your screenshot. MAY THE SCHWARTZ BE WITH YOU!  ;-))

thanks, I tried it with previous and recovery. will go for the update one now. hopefully it would work😃

Firefox often fails to restore the session which is why I recommend you make a copy of the folder however often you want. I try to do it once a week. see screenshot

it worked. thanks a lot. the upgrade one worked

Firefox often fails to restore the session which is why I recommend you make a copy of the folder however often you want. I try to do it once a week. see screenshot

had these tabs from 5 months. this never happened. was the first time. but now I will be keeping a copy of these.

You see my last backup was from November. Let me do it now.  ;-))

sure :)

I have the same problem I lost all the tabs. I tried doing your suggestions but ít doesnt seem to be helping.

There were 3000 open tabs on 19.01.2026 and I closed the browser- normally when I do so it refreshes itself and always the open tabs are recalled and reopened. However this time it didnt work. I see that all these tabs are visible on the History Reload Section but when I click it doesnt work either. I am so desperate and dont know how to fix it

From the files in your screenshot. With Firefox closed, you will see a file called sessionstore.jsonlz4 in your profile folder. This is your current session that I guess is not the one you want. Just rename it to something like old_sessionstore.jsonlz4_old. Then from your sessionstore-backups folder make a copy of one of the files from the screenshot I attached. Then rename that file sessionstore.jsonlz4 and the move it into your profile folder. Then open Firefox and it should be the session from the date of 1 of those 3 files that I show from your screenshot. MAY THE SCHWARTZ BE WITH YOU!  ;-))

can you check where I make a mistake and help me too please

Thanks for the reply. I actually have Firefox keeping all my information for now so there is no reason it should be clearing it. My question still stands: I do not see "Restore Previous Session" in the "History" drop-down. That prevents me from restoring a recent session without going through the file name change etc. that you suggested. Why do I not have the "Restore Previous Session" as an option in "HIstory"?