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I lost ALL MY PASSWORDS after an automatic update

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Today I have closed Firefox so it can install a pending update. When I started it again, all of my passwords were lost. I have searched for a solution but all the articles I've read so far explain how to recover the information from an old profile, which I don't have. In another article talk about a corrupted login.json file, that I don't have either.

Please, I need to recover my passwords! Thanks

Today I have closed Firefox so it can install a pending update. When I started it again, all of my passwords were lost. I have searched for a solution but all the articles I've read so far explain how to recover the information from an old profile, which I don't have. In another article talk about a corrupted login.json file, that I don't have either. Please, I need to recover my passwords! Thanks
Attached screenshots

All Replies (1)

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I've installed this extension to show information about Firefox Sync and found that all 88 records for passwords are deleted! Is there any way to fix this?