Firefox 커뮤니티 포럼

I've been importing Firefox profile data for my clients for as long as I can remember by simply overwriting the new empty profile with the profile folder from their old computer.

Unfortunately, no matter what I do today, I get "access denied" errors when trying to overwrite the profile data. I also receive "access denied" when I try to take ownership or change permissions on the profile folder (I tried both the user profile folder and the profiles folder it's contained in). The user is a local Windows admin and I've also tried using a different local admin account. Firefox is not running in processes. I even tried just copying places.sqlite and Favicons.sqlite for bookmarks and get "Destination Folder Access Denied" You need permission to perform this action.

Hello, I'm not sure which genius decided it would be a good idea to have the latest update (141.0) automatically change the Firefox settings to 'clear history when Firefox closes' but that is what happened on both my computers... I obviously didn't notice just lost years of research history as well as all my tab groups. No information in session history at all (before today). Nothing at all in session restore. Is there ANYTHING that can be done to restore my history? Genuine suggestions appreciated.

Just updated from version 140.0.4 to version 141.0 and all my bookmarks AND browsing history are gone! I do see the appropriate files in my Firefox profile folder.

I tried following the instructions in the "Fix "The bookmarks and history system will not be functional" error message" article (https://support.mozilla.org/en-US/kb/fix-bookmarks-and-history-will-not-be-functional?as=u&utm_source=inproduct&redirectslug=The+bookmarks+and+history+system+will+not+be+functional&redirectlocale=en-US), but they are not correct, i.e., Solution 3: Update Security Software definitions does not apply as I have Defender turned off in favor of using ZoneAlarm. And those instructions say to update the definition, but there's not place to update the definitions.

I tried to import bookmarks from the Bookmarks folder, but when I click on "Choose file", Firefox either does nothing or shuts down without displaying any error.

100% disappointed with this update!

Greetings Ya'll,

Firefox Bookmarks are no longer being initially placed in "Other Bookmarks, they are now being placed in the "Bookmarks" that is under the "Open Application Menu" Tab.

I've found that the "New Bookmarks" can be "Dragged" as a copy to "Bookmarks", from the "Bookmarks" located in the menu, for they will stay there unless I delete them

I can not move the "Bookmarks" back to "Other Bookmarks"

Would I lose My Bookmarks, If I "Refresh" Firefox, as suggested in the "Troubleshooting Section? If there is a chance of this happening then that would Absolutely Be Catastrophic!!

"Give Firefox a tune up

The Refresh Firefox feature can fix many issues by restoring Firefox to its default state while saving your essential information. Consider using it before going through a lengthy troubleshooting process."

I am on revision 141.0 (64-bit). I believe it automatically updated on 7/20/25 or 7/21/25) PDT. All of my history is gone! There are some bookmarks missing too but those aren't important compared to losing my history.

I only have one profile.

Can someone help?

Thanks.

I just lost all of my bookmarks and am unable to add new bookmarks. I am not aware that I made any changes, nor was anyone else using this computer, they simply disappeared. When I log into a familiar site and hit add bookmark, nothing happens. Also, if I go to manage bookmarks and attempt to manually add the book mark it doesn't work. Any suggestions? I prefer to use Firefox as my browser, but will have to switch if I can't resolve this!

I was working away on copying some files, nothing to do with Firefox. Firefox was open, though I hadn't used it in several minutes. Upon returning to Firefox, I noticed that although my browser had been open, it was not open anymore. All that was open was the download window.

At times in the past, I've accidentally closed the browser window while the download window was still open. I thought maybe this was what had happened this time, even though I absolutely didn't do that. I closed the download window and clicked on the icon on my desktop to restart it.

And that was when I discovered...no more tabs. Not a single one. Just a plain single blank tab.

In searching for an answer, I found this page: https://support.mozilla.org/en-US/questions/1396868 but in my confusion and horror and anxiety over needing to get the tabs restored, I had missed this part: "Assuming you found the .html file, it should indicate which .jsonlz4 file it was listing out. Is that the file you want to roll back to (the .jsonlz4 file, not the HTML file)?" and I had started to follow the procedure below it, and after renaming the two files as specified, I realized...I don't have a file to restore.

And so now I have nothing. I don't know how to restore my tabs at all. I literally have no access to anything, because all was tied up in those tabs. How do I restore them? I did find another procedure elsewhere that used "History" and "Restore previous session," but the problem with that solution is that in the "History" there's no such option at all. (This is where I found that one.) https://www.bleepingworld.com/restore-previous-session-firefox/

I'm so afraid to try anything now, I haven't had this problem in years and now I'm totally lost and afraid to mess this up more.

As for the browser I'm writing about, it's the latest Firefox, as I have it set to automatically update. OS is w10.

Also, I only have sync set for passwords. I don't have it set for tabs, for the reason that I use different ones on different devices.

Please, please, help!

Thanks in advance.

My wife's Firefox was triggered from an e-mail link and in the process got updated to release 141.0 The result is that the tabs from the previous verion have not loaded. Can I still recover them?

I was trying to revert to an older version of Firefox. It asked me to create a new account to avoid data problems and junk. I clicked that, something went wrong, I ended up logging into my original account, and now all my bookmarks, add-ons, history, everything is gone, and there's nothing to sync anymore for some reason, even though it was working before. And the older Firefox I downloaded automatically updated to the newer version, so it was pointless. What do I do? Please help.

Edit: Nevermind, I figured it out. I was using the wrong Firefox profile for my account.

I turned off my Windows 11 PC a few hours ago. Prior to turning the PC off,all was working very well as it has done since inception 12 months ago. When I turned PC a bout an hour ago, I have noticed that all my bookmarks have disappeared as well as my Toolbar and all items that were on the Toolbar. In addition attempts to "save" new bookmarks are fruitless. I did a "refresh" on Firefox but there was no improvement. Latest version of Firefox was automatically uploaded by Firefox last night - whether that has caused the upset I do not know.

Additionally - when PC was operating properly prior to being turned off today, I was able to use "Snipping" tool which I can no longer use.

I really need help please. Ron

I recently installed Firefox for security reasons, but I now realize it might be not better than other browsers... I had a (good) number of tabs opened in 12 Simple Tab Groups, which were opening all right everytime I restarted my computer. But today, Firefox opened and oh, all my tabs have disappeared ! All 12 Simple Tab Groups are empty. In the Recently Closed Tabs in History, I only could find and reopen 26 tabs - a very small part of the tabs I had... Please, tell me if there is a solution to recover all my tabs. Is the problem with Firefox or with the Simple Tab extension?

I've been using Firefox for many years, and today when trying to open, it froze up and said it was a version that was no longer working.? So I went to firefox.com and downloaded it again onto my Mac desktop. I am logged into my Mozilla account, but none of my info from my account shows up! Where are all my bookmarks, passwords, tabs???? What do I do?

My Firefox Updated today and just closed randomly, on reopen it was brand new with no history/bookmark etc. I didn't have a firefox account at the time. Is there a way to restore it since i used a lot of mozilla auto set passwords which have also been deleted.

I had to do an OS reset on my Dell Inspiron 17 3000. This deleted all my data files. A computer repair shop used Recuvr to recover my lost data. All of the recovered files (not just the Firefox files) are in a single folder on my desktop. I would like to know how to import them to the newly installed Firefox. Thank you very much.

Hello, for some reason all my tabs just closed and i cant get them back by any way either than recovering last session, but when im trying to follow the way "history - recover the last session" there is no such option as "recover the last session", are there any other ways to recover the session or make this option appear? firefox version - 140.0.4 (64 bit)

After Firefox requested to be updated, I lost all of my bookmarks. I tried to go in and "restore" them but there are no backups to restore from. How do I get my bookmarks back?