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Where is Firefox profile for 104.0

  • 13 replies
  • 2 have this problem
  • 1 view
  • Last reply by Gee580

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Hi I put "about:support" in the URL field. The pressed "Open folder" button on the profile folder section on the troubleshooting page, then I got an error: "Location is not available." I looked for the folder, but I could not. "about:support" describes the location "C:\Users\xxx\AppData\Roaming\Mozilla\Firefox\Profiles\forv3n79.default-release but the Roamig folder does not contain "Mozzilla" folder and the subdirectories.

I want to take the backup as the purpose.

I suppose this is a bug. So, could you fix it?

Thanks, G

Hi I put "about:support" in the URL field. The pressed "Open folder" button on the profile folder section on the troubleshooting page, then I got an error: "Location is not available." I looked for the folder, but I could not. "about:support" describes the location "C:\Users\xxx\AppData\Roaming\Mozilla\Firefox\Profiles\forv3n79.default-release but the Roamig folder does not contain "Mozzilla" folder and the subdirectories. I want to take the backup as the purpose. I suppose this is a bug. So, could you fix it? Thanks, G
Attached screenshots

All Replies (13)

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There's one other method here -

Finding your profile without opening Firefox https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data#w_finding-your-profile-without-opening-firefox

Note that those are hidden folders.

You may have to search for Profiles in Windows explorer.

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You appear to be using the Firefox MSIX version from the MS store. It is possible that this version works differently than the regular version. https://support.mozilla.org/en-US/kb/download-firefox-windows-microsoft-store

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Thanks for your reply, RobertJ, and cor-el.

I tried "Finding your profile without opening Firefox." However, it did not work. Then I found the profiles by using Window Explorer. It seems like the location changed. "C:\Users\xxx\AppData\Local\Packages\Mozilla.Firefox_n80bbvh6b1yt2\LocalCache\Roaming\Mozilla\Firefox" The location does not match "about:support." So, I want to ask Mozilla team to correct it but I'm not familiar with how to process it.

I knew installing firefox via MS store was different from the regular installer. Before 104.0 or past, the location matched with "about:support."

Thanks, regards, G

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I found some information about profile folder locations for Firefox MSIX (Microsoft Store) installs here: Bug 1727878 [MSIX] Firefox is no longer opened after Refresh

From what I gather, If you only installed Firefox from the Microsoft Store, then the "C:\Users\xxx\AppData\Roaming\Mozilla\Firefox\Profiles\forv3n79.default-release location shown in about:support would be a "virtual" location while the "real" profile folder would be in the \AppData\Local\Packages\... location. However, you said (quote), I put "about:support" in the URL field. The pressed "Open folder" button on the profile folder section on the troubleshooting page, then I got an error: "Location is not available."

That looks like a bug. Can you file a Firefox bug report and include [MSIX] in the summary? You can use this link to file the bug: https://bugzilla.mozilla.org/enter_bug.cgi?product=Firefox Please give as much information as possible when you file the bug report and post back here with the bug report number.

I also started a discussion about this in the Profiles - Where Firefox stores your bookmarks, passwords and other user data article discussion, about adding more information to the article about Mozilla Store installations and finding the profile folder: https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data/discuss/10897 Profile folder location for Firefox MSIX (Microsoft Store) installation

Modified by AliceWyman

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Hi AliceWyman. Thanks for your information. I have submitted this to Bugzilla. The bug number is [[Mismatching Profiles location...........|https://bugzilla.mozilla.org/show_bug.cgi?id=1788052]] I will cooperate with you guys as much as I can.

Thanks, Regards, G

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Gee580 said

Hi AliceWyman. Thanks for your information. I have submitted this to Bugzilla. The bug number is [[Mismatching Profiles location...........|https://bugzilla.mozilla.org/show_bug.cgi?id=1788052]] I will cooperate with you guys as much as I can. Thanks, Regards, G

I get "Access Denied" and the message, see " You are not authorized to access bug 1788052" when I try that link so it must have a security flag set. Can you make the bug public? If not, good luck and let us know the outcome.

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Hi AliceWyman,

Oh, I'm so sorry. I made mistake. I did not know the consequence. I have asked them how to change the classification to "bug public" or do you know? I really want you to participate in them. Meantime, the progress is as follows.

Reporter Description • 4 hours ago Attached image The error message and showing wrong location — Details

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:104.0) Gecko/20100101 Firefox/104.0

Steps to reproduce:

   1. Put " about:support " in the URL field and enter.
   2. I see the location as " C:\Users\xxx\AppData\Roaming\Mozilla\Firefox\Profiles\forv3n79.default-release. "
   3. Press " Open folder " next to Profile Folder
   4. Get the error " The location is not available. "

I also tried Win key + R and %APPDATA%\Mozilla\Firefox\Profiles Then got the same result.

So, reproducing is very easy.

Actual results:

I could not get profiles by pressing Open folder."

However, the profiles are in a different location as follows. C:\Users\xxx\AppData\Local\Packages\Mozilla.Firefox_n80bbvh6b1yt2\LocalCache\Roaming\Mozilla\Firefox I found them by searching with Windows Explorer.

Expected results:

The open button should open the profiles location in Windows Explorer. Hiroshige Shizuta Reporter Comment 1 • 4 hours ago

Hi, May I ask you to fix a bug with Firefox 104.0 MSIX that my PC installed via MS Store? The problem is mismatching the Profiles location that is between the actual location and indicated in "about:support." I press the Open button in Troubleshooting Information. Then I get an error "The location is not available."

I have been using the MSIX version of Firefox for a long time, and this problem has not happened.

I went to the location of the Profiles suppose to be there by Windows Explorer. It was nothing. Then I searched the profile in Windows Explorer and found them in a different directory.

I have posted this on the Firefox community forum and the title is "Where is Firefox profile for 104.0." https://support.mozilla.org/en-US/questions/1387574

My system Firefox Windows MSIX package Mozilla-MSIX - 1.0 104.0(64-bit) Windows 11 pro v21H2 (OS Build 220000,918) Intel Core i7-8565 Memory : 32 GB SSD 1TB and 500GB. Free space 484GB and 325GB respectively. :Gijs (he/him)

Comment 2 • 2 hours ago

This doesn't seem like a security issue that needs to be kept hidden? Group: firefox-core-security → mozilla-employee-confidential Component: Untriaged → Installer Nick Alexander :nalexander [he/him]

Comment 3 • 1 hour ago

Reporter: this is a weirdness with MSIX packages and Microsoft's virtualization of paths. That path is correct, I expect, from within Firefox. If you paste that path into the URL bar, I expect you'll see the correct thing. The issue is that outside Firefox, the path isn't correct. Distinguishing this is tricky.

gijs: correct -- this is not a security issue.

bhearsum: can you attach this to the profile virtualization issues? Flags: needinfo?(bhearsum@mozilla.com) Hiroshige Shizuta Reporter Comment 4 • 25 minutes ago

(In reply to :Gijs (he/him) from comment #2)

   This doesn't seem like a security issue that needs to be kept hidden?

No, it is not. I made mistake. Do you know How to change the classification to "bug public" ? Hiroshige Shizuta Reporter Comment 5 • 8 minutes ago

(In reply to Nick Alexander :nalexander [he/him] from comment #3)

   Reporter: this is a weirdness with MSIX packages and Microsoft's virtualization of paths. That path is correct, I expect, from within Firefox. If you paste that path into the URL bar, I expect you'll see the correct thing. The issue is that outside Firefox, the path isn't correct. Distinguishing this is tricky.
   gijs: correct -- this is not a security issue.
   bhearsum: can you attach this to the profile virtualization issues?
   Explorer
   Which is the correct pass that should get the profiles,
   C:\Users\xxx\AppData\Roaming\Mozilla\Firefox\Profiles\forv3n79.default-release that is in about:support.
   OR
   C:\Users\xxx\AppData\Local\Packages\Mozilla.Firefox_n80bbvh6b1yt2\LocalCache\Roaming\Mozilla\Firefox that is found by Windows Explorer search and took 20min.

Hiroshige Shizuta Reporter Comment 6 • Just now

Sorry, it messed up the thread.

Hi, Nick Which is the correct pass that should get the profiles, C:\Users\xxx\AppData\Roaming\Mozilla\Firefox\Profiles\forv3n79.default-release (that is in about:support.) OR C:\Users\xxx\AppData\Local\Packages\Mozilla.Firefox_n80bbvh6b1yt2\LocalCache\Roaming\Mozilla\Firefox (that is found by Windows Explorer search and took 20min.)

I put the first one in the URL, but I could not get them. Instead, I get "Firefox.exe."

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Hi AliceWyman,

This editor for post is not easy to use. And sorry for messing this up.

The point is as follows.

Nick Alexander :nalexander [he/him]

Comment 3 • 1 hour ago

Reporter: this is a weirdness with MSIX packages and Microsoft's virtualization of paths. That path is correct, I expect, from within Firefox. If you paste that path into the URL bar, I expect you'll see the correct thing. The issue is that outside Firefox, the path isn't correct. Distinguishing this is tricky.

gijs: correct -- this is not a security issue.

bhearsum: can you attach this to the profile virtualization issues?

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I see from what you copied from the bug report that the flag was changed as follows: Group: firefox-core-security → mozilla-employee-confidential but, since I am not a Mozilla employee, I still get "Access Denied" and the message, "You are not authorized to access bug 1788052". Can you ask again to make the bug public by removing mozilla-employee-confidential ? In any case, the issue I think should be fixed is your description, (quote) I put "about:support" in the URL field. The pressed "Open folder" button on the profile folder section on the troubleshooting page, then I got an error: "Location is not available." As I see it, the actual Firefox profile folder location should open when you click "Open Folder".

Modified by AliceWyman

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Hi AliceWyman,

I'm sorry for the patience. I asked them again as bellow. So far, no update on #1788052 by them.


Could you help me? I want to show this bug track to another support forum community member. When I opened this report, I checked for "Only users in all of the", selected groups can view this bug: then I checked a box that "Confidential Mozilla Employee Bug (non-security)." I was wrong because I'm not familiar with an opening case on Bugzilla.

I also tried to uncheck it by myself, but nothing happens and stays checked.

A community member experienced this bug before and she can help to solve this problem.

If she could not see this case by this Friday., I'll close this BUG# and reopen this case as new.

Thanks in advance,


Thanks, regards, G

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Hi AliceWyman,

It seems like a kind staff has corrected the check box. I think now you can access bug#1788052. Could you try it?

Thanks, regards, G

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Yes. I can access the bug report now and I'm following its progress: Bug 1788052 Mismatching Profiles location between actual location and indicated in "about:support."

I'll add the bug report to the Profiles article discussion thread I started.

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OK, AliceWyman.

I posted my test result on bug#1788052. The repoducing seems easy. The profiles have not been there and installed FFX via MS store as newly. The bug may occur.