Diễn đàn hỗ trợ Firefox

An hour ago I had all of my Firefox bookmarks. Ten years of meticulously filed and regularly culled references that I use multiple times daily. I rarely log out of Firefox sync, so that I can keep them up to date.

I now have no bookmarks and no tags.

For some context, two things just happened simultaneously. So, I'm not entirely sure which is the culprit.

1) Firefox just updated and I rebooted my computer.

2) Norton 360 updated sometime in the past two days. I attempted to familiarise myself with the new interface. Foolishly, given the track record of Norton-360-for-breaking-your-games, I ran the disc cleanup, which recommended I remove approximately 400 Mb of data. Norton stated this data was temporary files. If they were indeed my bookmark history, nowhere did Norton indicate they were bookmarks. Also, never have I encountered a disc cleanup that wholesale wipes bookmarks. I do hope Norton is not the culprit and this is just a glitch, because if this were due to Norton having no safety net for deleting an entire library of bookmarks - and they can't help me restore them - then that will be the final nail in the coffin for me doing business with Norton.

The suggestion to go to Import and Backup in Firefox, then click Restore, offers only the option of Choose file... - and then launches nothing.

Currently, I'm seeking any means of restoring my bookmarks. Any help would be appreciated.

I had presumed that I was taking reasonable measures through my Firefox Sync settings to protect my bookmarks and ensure they could be restored in the event of accidents. If these bookmarks are permanently lost, the amount of work I've just lost is quite the blow.

Edit No. 01: After writing this, my Bookmarks Toolbar is also now empty. Perhaps it had wiped earlier, but was merely waiting for a refresh to take effect.

Edit No. 02: Also, it seems I am unable to create any new bookmarks. I shall read the help suggestions relating to that now, to see if it's a relevant issue.

Hi

I've just booted my machine and opened Firefox, only to be presented with a completely fresh install.

All my settings, bookmarks and history gone. It was fine yesterday when I closed it and powered down.

I'm running Kubuntu, I've checked the .mozilla folder and nothing...it's like my profile has just been overwritten.

Not happy at all, I'm starting to dislike Firefox.

Can anyone offer any help or advice please?

Thanks in advance.

I had a lot of tabs open in Firefox, and they always stayed there even after restarting my PC. But suddenly, all of my tabs disappeared, and I can’t recover them using “Recently Closed Tabs.” Can I get them back?

Today I opened Mozilla at my laptop. It malfunctioned (videos froze, pages did not fully download), so I closed the window and after a couple of seconds I reopened it. My previous session was gone. I read your articles regarding this issue, did what was described there, but nothing has changes. I lost everything! Job videos, hobby pages - everything! A couple of pages can be restored via history, but that's it! I didn't do anything special before closing the window!

I don't know whether this happened after an update - there was one a few days ago, but I only realised this morning, after switching on the computer, that all my bookmarks are missing. The toolbar is there, empty, only reading "For quick access, place your bookmarks here on the bookmarks toolbar"... I wish! I tried to restore the bookmarks - but it seems there is no backup to restore at all. Then I tried to check my profiles, but there is only the one currently in use. Then I tried to move a tab to the bookmarks toolbar - and nothing happened. Then I began to panic: toolbar apart, we're speaking about years of bookmarks, most of them related to my research for my books... All the advice in the support seems to point towards profiles and backups, but, as I said, it's clearly not my case... Please, please, please: help!

Mozillers,

I depend heavily in my environmental and other work on Firefox and am grateful for its ability to restore previous tabs when my laptop, not infrequently, stops working abruptly.

Now the much-used bookmarks have disappeared. A search site states promisingly:

"To restore Firefox bookmarks, use the built-in backup feature by going to Menu > Bookmarks > Manage Bookmarks > Import & Backup > Restore, then select a dated backup or a manual file (like a JSON backup) to bring back lost bookmarks..."

But my Firefox's Bookmarks drop-down menu has no Manage Bookmarks option. PLEASE, what must I do?

Elsewhere I managed to find this file which apparently contains recent bookmarks:

"C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\unk14jlv.default-release-1647366062305\bookmarkbackups\bookmarks-2025-12-26_95_4IdGtYxezJpwuH1UIiT1bRwe1K6bcGO8rv0mqa9rUWU=.jsonlz4"

But attempting to open it with Applications\firefox.exe (default) accomplishes nothing.

FOOL-proof instructions would be wonderful. Thank you.

Hi! i was wondering why my firefox reseted after reboot. i have all the important tabs and bookmarks for my university work, chores and articles, platforms that are mandetory on my uni. also, i was tinkering with partitions before the reboot because my steam didnt want to run any games. i was guided by the chat gpt with terminal coding to do get steam working even tho i didnt solve the problem. is there any way you can help me?

Hello, FF 139.0.4 on MAC Sequoia15.5. Lost ALL references to bookmarks, i.e. Bookmarks Toolbar totally gone. How can/do I restore from .jsonlz4 file in bookmarkbackups. Also, will I be able to salvage my previous profile, presumably containing my older "Tabs on Bottom" work-around? Alternatively, is there a process to restore JUST Firefox from Time Machine? Appreciate any advice.

Hi, I recently purchased a new laptop and want to bring over the bookmarks I had from my old laptop. I had copied what I thought was the profile from the old one and copied it into the new laptop - but I'm not sure of the next steps :(.

cleaning up my computer, I accidentally deleted firefox. I had a list of favourite links, and I lost them. Is there any way of recovering my list of favourites?

thank you, Glen A Goodale, [email removed]@gmail.com

Bookmarks in Firefox disappeared and cannot import my Bookmarks backup. I have tried to restore an older Bookmark file through /manage bookmarks/ import and backup/restore to no avail. thank you

Several times now I've closed firefox while having the open previous windows and tabs on startup on only for all my tabs to have been closed (with this time in particular being annoying due to losing tabs that I needed to have the specific link for). Is there any way to restore tabs lost in this way?

Since yesterday, I suddenly had to recreate my Firefox account, which I have used for a long time. For no apparent reason, my email was not recognized as an existing account when I tried to synchronize my browser. As a result, I created a new account using the same email address. Consequently, all my email masks have disappeared from relay.firefox.com. Is there any way to recover those masks?

Hello, I'm experiencing an issue with tab groups in Firefox.

• I use multiple tab groups in my browser.
• Normally, if I close the browser (without manually saving the groups), Firefox restores everything exactly as it was when I reopen it including all my tab groups and their current tabs.
• However, if Firefox crashes while the groups are open, I run into a problem:

 * When I restart Firefox after the crash and try to open my tab groups, all the recent tabs are missing.
 * Instead of restoring the most recent state of the tab groups, Firefox loads an old, manually saved version from the past.
 * Any recent changes to the tab groups are completely lost.

This has happened multiple times now.

• • System Info:**

• Firefox version: 141.0 (64-bit)
• OS: Windows 11

I'd appreciate any help or suggestions to prevent this data loss after crashes. Is there a way to make Firefox auto save tab group states more frequently, or restore the most recent session even after a crash?

I asked a question about a week ago. I can't even see the question anymore. While this was going on I received these emails. All times are in Australian CST.

Thu 2025-07-31 11:04 PM Your Mozilla Support request has been updated 305857

then I got tha same message again

Thu 2025-07-31 11:04 PM Your Mozilla Support request has been updated 305857

the next day I couldn't get in so I had to reset my password

Fri 2025-08-01 11:18 AM Forgot your password? Fri 2025-08-01 11:25 AM Your password has been reset

Then this appeared about 50 minutes later

Fri 2025-08-01 12:14 PM Forgot your password?

I found out about Mozilla Monitor and thought it might help

Fri 2025-08-01 12:14 PM New sign-in to Mozilla Monitor

Fri 2025-08-01 12:21 PM Mozilla Monitor⁩ found no known breaches

Then I got:

Fri 2025-08-01 12:30 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

again

Fri 2025-08-01 12:31 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

and again

Fri 2025-08-01 12:31 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

and again

Fri 2025-08-01 12:33 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

Then I got

Fri 2025-08-01 11:32 PM Mozilla Support Request: Share your feedback with us

which contained a copy of my post [I have made a bit of a hash up with my mozilla related logins]

Thu Jul 31, 2025, 07:34 but was appartntly sent by "Anonymous User"

this email wanted to know if I was satisfied - how could I be, when the problem wasn't solved?

next I asked another question {Which I can't see in my Emails} which netted me this reply,

Sun 2025-08-03 08:52 AM Mozilla Support Forum<no-reply@support.mozilla.org>

next I was back to this again

Mon 2025-08-04 03:59 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

and again just this morning!

Thu 2025-08-07 10:08 PM Approve sign-in to Mozilla / Did you sign in to Mozilla?

I am as much a believer in security as the next person but I don't understand what is going on,

I have had no response to my original ticket, which I beleive was number 305857 which I can no longer find any refernce to in my account, and I still have a completely blank Library! and I can't even make any new bookmarks!

Plaes help, Yours sincerely, Ms Jacq Felis (AKA Kaelkitty).

I cannot figure out how to add my favorite things to the toolbar. The toolbar doesn't even show up at the top of my page. I just get a string of random bookmark names under the address bar with the Other bookmarks folder at the end. I can't even get rid of "Finish Setup" which is the last one shown. How do I do find where the toolbar is hidden and get it to show? Once I do find it, how can I add my favorite items to the toolbar? I even had ask a question online to find out how to restore my most recent bookmark which was backed up in the documents folder on my computer. Any suggestions would be very helpful. I don't like the way Mozilla Firefox looks now. It isn't as easy to use. I have included what the top of page looks like now. I am sorry I didn't think to keep one of how it used to be.

Hi, All of a sudden, I lost absolutely all of my bookmarks. My PC is running Windows 11. My Firefox account was and still is logged in. At first, I thought the data loss was due to a CCleaner cleanup using their latest update. After the data was lost, I tried running another CCleaner cleanup, but this time it didn’t delete the bookmarks. So I honestly have no idea how this could have happened. These were bookmarks I had saved over many years... It’s a disaster.

PLZ Help

The launch of Firefox Profiles seems to have obliterated everything in my account: bookmarks, history, open tabs, and extensions are all gone completely. I have an option to import files from another browser, but not from my own past firefox. I logged into my Mozilla account, but I didn't have any other devices so I think it was still unable to recover the data? Is there anything I can do about this, or is all of my data truly gone?

CCleaner wiped out my bookmarks and their functionality. I have repaired, then uninstalled CCleaner. I have refreshed, uninstalled then reinstalled Firefox. I have logged in and out of Firefox. I have made an HTML file of bookmarks from another device in order to try to import them. Firefox bookmarks will not proceed to an upload stage. I went into setting to add the HTML of bookmarks and it said "this is not a bookmarks file." Well, Firefox made that HTML bookmarks file so I have no idea how that could be. Nothing I have tried has worked.