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Roughly every 2 weeks I backup important files to a external hard drive.

One of the things I always backup is my Firefox profile. I have been doing this for years without any problems.

I 7zip my profile and copy it to the hard drive.

I tried to do this yesterday (July 25 2025), and was getting access denied messages for files in the profile. So I tried to simply copy the profile. Same thing access denied.

I cleared the history, used wise disk cleaner, rebooted my machine and tried again. Same thing access denied when trying to backup or copy the profile.

I am assuming that this is happening since 141 because I updated Firefox since the last time I backed up my profile, and never had a problem previously.

Could anyone have an idea what the problem is? Thank you for your time.

I went to [https://support.mozilla.org/en-US/kb/firefox-backup] and under "Create a Firefox backup file" at step 3 it says, "Scroll down to Backup, and click Manage backup" but when I went there no such "Manage backup" option exists as you can see in the attached screen capture. So what gives? How can I "Create a Firefox backup file"? I am using Firefox v147.0 (64-bit) on Windows 11 Please instruct. Thanks RJB

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

I reinstalled windows yesterday. When I installed firefox and signed it, everything was fine. However, this morning, it seems to have removed 80% of my bookmarks. When I try to restore from the bookmarks yesterday, it just gives me the ones that I have this morning. I had tons and tons of resource bookmarks for my work that would be almost impossible to re-find in some cases due to the current state of search engines. Is there any way to salvage them? It seems like sync believes they never existed, but it DID sync them yesterday??? Please help.

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.

I fear I must reset or reinstall Firefox. Before I do that, I want to save the URLs of the open windows. Or save a larger set of URLs, such as shown in the Library window at History>Last 7 Days.

How can I save this data?

Any progress on this? Import bookmarks is already in Firefox android Nightly — export bookmarks should be just as easy, especially for privacy-first users who can't use Sync.

Firefox update today 1-14-26 says Restore FF with a backup file" Instructions say go to Settings/Sync/Backup/Manage Backup. My Sync has no Backup option, only shows: Sync Manage account Device Name Syncing: ON You are syncing these items across all your connected devices: Bookmarks Open tabs Add-ons Settings Connect another device . How to proceed?

(I don't recall setting Syncing to "On" before; it also showed me as automatically logged in to my account.) Assistance appreciated! Thanks!

Hi,

On the "Your Firefox has updated" page, I recently found out that in addition to Firefox Sync, you can also create a backup in the form of a local file. When I try to follow the instructions on the support page for the function (here I get stuck. For some reason I am only allowed to choose a file to restore my data, but I am not allowed to create a new backup. I have tried refreshing Firefox and even creating a new profile, but both have the same issue. I am not seeing a "manage backup" button either (see screenshot).

It's not the end of the world thanks to Firefox Sync, but I would like to get it working as a nice backup :)

Thanks in advance for any help you guys can give me!

Hello, I just tried to import bookmarks to Firefox, however they're not appearing on the title bar?

I imported bookmarks to desktop Firefox 134.0.1 (aarch64) on raspberrypios - 1.0, but the title bar only shows Import Bookmarks... and the imported bookmarks are located in Library -> All Bookmarks -> Bookmarks Toolbar/Bookmarks Menu -> Mozilla Firefox -> Imported Bookmark.

I am trying to export/import my book marks from one macOS computer to another (intel to Apple silicon), however, all of my imports and restore attempts fail. My last restore attempt failed with the following message: Firefox Unable to process the backup file. Any other suggestions?

If I go to the profile folder, exit firefox then copy and paste the folder to a backup location. The attempted backup fails. Something about permissions as I recall. I have tried many things unsuccessfully. Something has changed that does not allow for the backup of profile folders. Adding a backup option to the profile manager would be nice. I noticed some people have found work-arounds but I need a straight-forward procedure for backing up my folders. No work-arounds please, just a simple procedure. May I ask for help with this issue?

I have Firefox installed on a Windows 11 desktop. The profile is missing, yet Firefox is working fine, and I see all of my bookmarks, etc.

I have windows set to show hidden files.

When I try to run %APPDATA%\Mozilla\Firefox\Profiles\ it tells me that the location is unavailable.

I cannot find the profile anywhere in file explorer, despite multiple tries to search for it.

If I go to Help > Troubleshooting Information, I see a "Location is not available" message, shown in the attached image.

I could uninstall and reinstall Firefox, but I'd prefer to solve this because the exact same thing is happening to my Thunderbird profile. It doesn't exist anywhere, yet I can see all of my emails and it appears to be working properly. I only found this problem because I wanted to backup my emails but was unable to.

Both of these profiles must exist somewhere, but I've tried everything to find them. Please help me fix this in Firefox, and then if I have a fix here I'll try to apply it to Thunderbird, where I have a lot of emails I'd hate to lose.

When my Mac got an automatic system upgrade to 15.1.1 I lost everything. I was able to recover all my files but I lost the foxfire bookmarks and bookmark bar. How can I recover them?

Is there anyplace that shows how to use what the new release says on the 146.0. I got the message below when viewing new options in 146.0, but going to settings, sync just wants me to sign in and do a cloud backup.

Doesn't sound like what is in message below that I got after updating to 146.0. From what I found looking around, you are suppose to go to setting, sync, click on backup and choose location. There is no option backup, just an option to sign on. Below is message I got when checking what is in update 146.0:

Windows 10 users can now automatically protect their passwords, bookmarks, and more by turning on backup in Firefox. Your browsing data is saved daily on your device and can be encrypted with a password When you set up a fresh install of Firefox on any operating system for a new device or your current one, you can restore from this backup and pick up right where you left off. This feature is currently available on Windows devices and will be coming to other operating systems soon.

My Profile Folders can't be backed up. Messages I receive while attempting a backup state that permissions are required to backup certain files. I'm working in an administrator account so that shouldn't be an issue and I use to backup my Profile Folders without an issue.

I'm asking this question so I can post some helpful information for people wanting to create a backup of their profile.

If you are using Windows OS and you got your download from the official website: https://www.thunderbird.net/en-US/thunderbird/all/

How do you locate the correct folder to backup? The backup must contain everything, profiles, mail accounts, emails, address books, calendar, preferences - the lot. The backup can be used to transfer between computers.