Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Caută ajutor

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Află mai multe

Acest fir de discuție a fost arhivat. Adresează o întrebare nouă dacă ai nevoie de ajutor.

I had to re-install Firefox, How do I add my backup logins and passwords

more options

I had to re-install Firefox, How do I add my backup logins and passwords? Step by step?

I had to re-install Firefox, How do I add my backup logins and passwords? Step by step?

Toate răspunsurile (7)

more options

Hi, what kind of backup do you have?

more options

Thanks....I have the files from my Profile: logins-backup.json and key4 They are suppose to contain the backed up files. How do I tell the computer to look there for the files?

j

more options

Did you set up Firefox again with a new profile? You can replace the new (empty) logins.json and its matching key4.db file with the old files. Hopefully this covers all the steps:

Open your current Firefox settings (AKA Firefox profile) folder using either

  • "3-bar" menu button > "?" Help > Troubleshooting Information
  • (menu bar) Help > Troubleshooting Information
  • type or paste about:support in the address bar and press Enter

In the first table on the page, on the Profile Folder row, click the "Open Folder" button. This should launch a new window listing various files and folders in Windows File Explorer.

Leaving that window open, switch back to Firefox and Exit, either:

  • "3-bar" menu button > Exit
  • (menu bar) File > Exit

Pause while Firefox finishes its cleanup, then in the File Explorer window, right-click logins.json, click Rename, and change the name to loginsOLD.json. Similarly rename key4.db to key4OLD.db. (Windows may hide the .db file extension; you can turn off hiding of file extensions using the steps in this article: https://www.bleepingcomputer.com/tutorials/how-to-show-file-extensions-in-windows/)

You may wonder why bother. It's so you can't accidentally replace the good files with the useless ones.

Next, copy the two old files and paste them into the new profile folder. There should not be any messages about replacing files because the files were renamed in advance.

Start Firefox back up again. Does the Logins and Passwords page have the expected data?

more options

Sorry, I just realized you said your old logins file was named logins-backup.json. I'm not sure how -backup got into the name. After pasting that file in the new profile folder, rename it to just logins.json. Hopefully it's the right file.

Modificat în de jscher2000 - Support Volunteer

more options

Yep, after I slept on it (less daily stress), this solution came to me. It's just a matter of coping the old backup files and putting them in the new "profile" folder.

Thanks, I really appreciate it

Jay

more options

Firefox 79+ can create a logins-backup.json in case of issues with writing to logins.json. Firefox 80+ can automatically restore the logins from logins-backup.json in case of a corrupt or missing logins.json

  • signon.backup.enabled [79:false][80:true]
  • bug 1597358 - logins.json is a 0-byte file. Create a backup during writes to it. [79]
  • bug 1593467 - Automatically restore from logins-backup.json when logins.json is missing or corrupt [80]
more options

cor-el said

Firefox 79+ can create a logins-backup.json in case of issues with writing to logins.json. Firefox 80+ can automatically restore the logins from logins-backup.json in case of a corrupt or missing logins.json

Thanks!