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Decryption tool for passwords in Firefox

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Back in November 2023 I had the misfortune of a software engineer not doing his job correctly and he reinstalled the OS on my laptop instead of repairing some software that wasn't functioning correctly. Mercifully, I have had Microsoft support working on recovering my data, which has proved a tremendous task. 4 months and counting.


We have now finally managed to recover my passwords for my browsers, but they are encrypted. Microsoft Support have therefore asked if Mozilla do a decryption tool as they cannot open the file without it being decrypted first. If I was using Microsoft Edge, they would have been able to assist as that is a Microsoft product, but as Firefox is a third party application, they've asked for assistance. By the way, these are NOT scammers or hackers 'helping' me, but Microsoft support and I get everything emailed about our support etc.

Thanks in advance.

Back in November 2023 I had the misfortune of a software engineer not doing his job correctly and he reinstalled the OS on my laptop instead of repairing some software that wasn't functioning correctly. Mercifully, I have had Microsoft support working on recovering my data, which has proved a tremendous task. 4 months and counting. We have now finally managed to recover my passwords for my browsers, but they are encrypted. Microsoft Support have therefore asked if Mozilla do a decryption tool as they cannot open the file without it being decrypted first. If I was using Microsoft Edge, they would have been able to assist as that is a Microsoft product, but as Firefox is a third party application, they've asked for assistance. By the way, these are NOT scammers or hackers 'helping' me, but Microsoft support and I get everything emailed about our support etc. Thanks in advance.

所有回覆 (4)

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Firefox stores the usernames and passwords encrypted in logins.json, the encryption key is stored in key4.db and you can only recover the logins via the Firefox Password Manager if you place a matching logins.json and key4.db in a profile folder.

有幫助嗎?

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Thanks for the reply. Microsoft have followed what you have put there and I am seeing what they do via a screen sharing mechanism, however, what are we to do next with the cvs file? Or is there another instruction that we have to follow. They've tried to do what it says on screen, but there is clearly a step missing because we cannot progress.

They have both the logins.json and the key4.db but what are the next steps that we have to follow in order to decrypt the information and bring it back?


Thanks in advance

有幫助嗎?

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Like I wrote above, easiest is to use the Firefox Password Manager to display the usernames and passwords. To do that you need to place logins.json and key4.db in the Firefox profile folder and start Firefox and open the Password Manager (about:logins).

You can possibly export the logins to CSV in the Password Manager.

You can also look at a Nirsoft utility.

有幫助嗎?

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Thank you for the reply. However, what we need to know is how do we create the CVS file for the data we have found in order that we can then use the decryption tool.


Would you kindly set out how we do that. Thanks.

有幫助嗎?

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