Firefox Community Forum

Hello, when automatic offline backup in stable firefox was first introduced, it worked perfectly fine. It created automatic backups in folder I pointed to. Unfortunately few weeks later it stopped working completely, no idea why. I tried following support article, which is limited to turning backup off, deleting folder and turning it on again. Unfortunately it did not help. As soon as backup starts, it gives me error and does not create any file. It shows "creating backup..." for few seconds, then this banner disappears and only error banner remains.

Can you suggest me advanced troubleshooting for this? Maybe there is some log file which could point me in right direction?

I am wondering if it is some issue with Polish language, because I point to D:\Firefox backup\Restore Firefox but it creates "Przywróć Firefoksa" folder.

helloooo

i am experiencing an issue with firefox where backup (Firefox Backup) is not working since version 148.0

problem: - when I try to create a backup, i get the error: “Hmm, there was a problem with the backup. Please try again in a few minutes.”

what I have already tried: - enabled and disabled backup password - changed the backup folder/location - cleared browser cache - tested across multiple updates (issue persists)

- backup is enabled, but I cannot create one - the error occurs every time - restarting the browser and system did not help

Background: On August 6th morning EST after the August 5 2026 update, attempting to use firefox lead to the window with the "end process" button so I had to close the browser multiple times and then the next time I opened firefox, the bookmarks and history were wiped. I was able to restore using a backup saved on the computer and continue as normal (aside from losing some Cookie Clicker progress, reinstalling Tampermonkey userscripts, and redoing browser extension settings) but now there's an issue with trying to backup firefox data.

Issue: Trying to back up my firefox data leads to a "There was a problem backing up. Try again in a few minutes."

When going to about:config and typing browser.backup.backup-debug-info, I get {"lastBackupAttempt":1786243812,"errorCode":9,"lastRunStep":13}

When looking at Broswer Console, there is an entry saying BackupService: Could not create C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini: NotAllowedError: Could not write to `C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini': failed to open file for writing (NS_ERROR_FILE_ACCESS_DENIED) BackupService.sys.mjs:4116:23 but I don't know how to address that.

I asked a question about how to sync my new laptop with the one on this old laptop (Windows 10) The problem I had is that the codes Mozilla sent to my email. That email is so slow that by the time I receive it, it already expired. This is the answer I got from a robot: One thing you could try is logging in to your email via a browser instead of the email app which could speed up the time it takes for you to get the email. Another solution is to manually copy the profile on your old computer putting it on a usb stick and the opening it on your new computer.

1. I always log onto my email via Firefox browser, and it still does not arrive before the code expires. 2. I went into my profile a clicked on "Copy Profile." Firefox copied my profile and asked me to rename it. I did that. Now there are two copies of my profile -- the original and the renamed one -- but my question now is: How do I copy it onto an USB drive? or how to "manually" copy my profile?

Lately, I occasionally get this message across the upper part of the Firefox window:

   " Firefox noticed your Windows 10 device might be causing problems with your apps. 
     Back up now to keep your firefox data safe

Is this actually from Firefox? If so, is there a way to see why it would be saying that?

TY