I-Firefox Community Forum

How can I transfer open tabs from my old computer to my new one? Syncing is enabled, and the sync tabs checkbox is checked, but the tabs aren't syncing on the new device. I also couldn't find any separate function to load tabs.

Hello!

I use a VPN when I access the web and I recently updated my OS (Mac OS Tahoe). I updated Firefox and now DNS over HTTPS (DoH) is enabled in Firefox. When I have my VPN enabled, I cannot access the web, there is some problem with DNS resolution. I have changed my Firefox DoH settings to Standard (I have also used Strict) and have typically been unable to resolve web URLs correctly. There have been a few times that I have been able to use 'Standard' DoH strictness / settings and also use the VPN successfully at the same time, but typically when I have the VPN enabled Firefox cannot access whichever 'mozilla.cloudflare' address it is attempting to use for DNS resolution.

The VPN vendor suggested always using the VPN's DNS resolver. I have done this and I still have the same problem. What should I do to ensure that I have secure DNS and can successfully use a VPN?

Thank you.

Hello, I have just installed Firefox version 144.0.2 on a new computer. I have access to all of the Firefox files and data on the original computer, but I am not able to run Firefox on that computer. Therefore, I am not able to create an export file from the original installation. Is it possible for me to import all of the original Firefox data into the new installation? Thank you very much in advance, Steve DeFeo

I have purchased a new computer and I want ot transfer al my bookmarks, login details etc onto the new one. I have followed the instructions given on your help pages, to no effect. My old computer ruins Firefox under Win 10. The new computer runs the same version under Win 11. I have copied the contents of Profiles from the old to the new, but Firefox says the profile is missing. When I copy and add the folders in Profiles to the Win 11 computer, there is no difference. The names of the folders in Profiles are different on each computer, so I think that it is looking for a particular file/folder name, but I don't know which one. Can anyone help me?

I'm upgraded to Win 11 Pro from Win 10 Pro. I noticed that the Bookmark menu button is gone, seemingly replaced by a Bookmark Bar. For me that's not a good thing. How can I get the menu button for Bookmarks back?

not sure how to bring Firefox bookmarks from my old laptop to my new one. Hate to lose them all ! i got a new lap top, have signed into Firefox, but don't see my bookmarks. Help.

Hello It is impossible to display the icons of certain applications since I used Firefox. This problem does not exist with Chromium browsers (Chrome Brave...) Thank you for your help

Firefox updated to the latest version and it lost everything. All my saved passwords are gone, all my bookmarks, data, etc. It said I could sign in with my account and it would sync them and bring them all over, it didn't. I can't use the original profile because it says it's outdated, I don't even know if it's the correct profile anyway. What am I supposed to do?

Something very bad happened to me today (11/3)....

Firefox 144.0.2 was installed on 10/30/25, and everything has been fine until today. I don't know why or how, but ALL of my OPEN tabs (of which I have many--and have it fixed so they always re-open when Firefox starts), ALL went away.

In reading conventional steps to recover such from sessionstore-backups, those instructions sounded straightforward. However, even though ALL FIREFOX PROCESSES were ended, I could not copy the contents of the sessionstore-backups folder nor could I delete anything--EVEN THOUGH I am the owner.

Even after providing Admin perms.

I could get rid of profiles.ini, which initially proved diasterous, because then Firefox thought I was brand new, so ALL of my passwords saved through Firefox these many years, went "poof".

Fortunately, I was able to get that back, but I still cannot get all of my tabs back, and conventional instructions to do so aren't working.

After recovering from my heart attack for initially losing my passwords, I am breathing a little better right now, but it sure would be nice to get all of my open tabs back again. I don't know why I am not able to manipulate the files within sessionstore-backups. I think if I could eliminate the files in that folder EXCEPT for upgrade.jsonlz4-20251027123126, which possesses a 10/29/25 date, these should be the open tabs just before the 144.0.2 installation, and all should be right with the world, once more.

I have performed/examined many steps offered under this category, but most assume I can copy them elsewhere for safe-keeping and/or removing all but the one I want Firefox to "use". Because something is preventing me from doing this, though, I am being stymied in what ought to be the solution. As a test, I was able to copy files from a much older profile--so I can prove the basic steps SHOULD HAVE worked. Unfortunately, I cannot do the same with THE (more recent) folder in question. I can't get rid of parent.lock, either (and I have ensured no Firefox processes are running via Task Manager).

Repeatedly.

Something else is at work, here. Any help or assistance from community experts would be most helpful.

Thanks very much in advance.

-MG

Firefox is shutting down all my active tabs automatically WITHOUT asking me. This is regularly happening and wastes a lot of time. Is it due to installing Updates ? I DON"T want ANY updates and I am fully happy with my current version. If this doesn't go away, I will have to delete this browser and move elsewhere.

After years of opening Outlook/Hotmail from my bookmarks or by entering the address, suddenly five days ago I can’t. All I get is a blank page with the address in the address bar (image attached). Using the same address, I can open it in MS Edge and Norton Private Browser, which has all of the Firefox bookmarks. I’ve spoken with Norton help, thinking that their program caused this, but they couldn’t solve it. Thank you

Hello Support Team,

Since updating to the newest Firefox instance, anytime I try to login to my Hotmail/Outlook account I get the following error: "You've tried to sign in too many times with an incorrect account or password." If I wait several hours I can login with the Firefox browser into my Hotmail/Outlook account successfully. This happens every singe time I try to login to the site after a period of time. Alternatively I can go to any other browser and login immediately with no issues.

Troubleshooting:

• Removed/Reinstalled Antivirus/Firewall Software (Did Not Resolve)
• Removed/Reinstalled Firefox with fresh instance (Did Not Resolve)
• Disabled Extensions (Did Not Resolve)
• Disabled Privacy Settings (Did Not Resolve)
• Cleared Cookies, History, Cache (Did Not Resolve)
• Cleared Forms (Did Not Resolve)
• Tried Private Window (Did Not Resolve)
• Tried Troubleshooting Mode (Did Not Resolve)

I don't want to have to switch to another browser for my browsing needs, but this has become a major issue for me. What else can we do to troubleshoot and resolve this issue?

Thank you in advance for your time.

Cheers, Jason

I have a bookmark folder with 12 entries. In the bookmark manager, I see all 12 entries. when I select the bookmark folder from the toolbar, the drop down menu only lists four entries,

Using firefox 144 on Kubuntu 24 LTS, on wayland, with Nvidia drivers.

I'm one of those guys with 500+ tabs. I also have a bunch of tabs open in specific containers and I recently spent a lot of time sorting most of my hundreds of tabs into a bunch of neat tab groups.

I'm not using any "sync between devices" functionnality

At some point, I open firefox like usual, and I noticed that it appears to be glitched. The rightmost tab (the last tab I had opened) seems to be working fine, but every other tab has no text, and I cannot switch to them. However, the colored line indicating that a tab is opened in a specific container still appears, it's just the tabs names that are missing. Also, firefox seems to generally not be responding, so I decide to close and reopen it.

Upon reopening, firefox restores my tabs, but I'm left with only the last tab I mentionned earlier. The "restore last session" button doesn't appear in "history". Neither "recently closed windows" nor "recently closed tabs" contain my 500+ tabs

I still have my extensions

I still have my bookmarks

I still have my base "new tab" setup, with my background image and my "pinned" websites (I don't know how it's called)

I still have my container "rules" (i.e, firefox still proposes to open specific domains with specific containers, even if I have lost old tabs that were opened in those containers)

I still have my "auto sign-ins" (i.e, I can still log into some websites without re-typing my password)

I have lost my tab groups

I'm used to losing my tabs. So I close firefox, and I go look in it's files.

The image firefox-mpris in the files still displays a youtube tab I was watching (yet this tab doesn't get restored)

I make a copy of sessionstore.jsonlz4 and sessionstore-backup, and try restoring from each backup by replacing sessionstore.jsonlz4 :

- the default sessionstore.jsonlz4 doesn't have my tabs of course

- previous.jsonlz4 has only the single last tab I mentionned earlier.

- recovery.jsonlz4 contains only 20-ish of some of the most recent tabs I had

- the "upgrade" files contains a bunch of tabs but it's from a few months ago so I'm missing the most recent stuff

Using this "scrounger" tool, I can look at what these files contain

https://www.jeffersonscher.com/ffu/scrounger.html

- sessionstore.jsonlz4 and previous.jsonlz4 both contain the single tab we talked about before (plus closed windows I don't care about)

- recovery.jsonlz4 contains exactly 25 recently opened tabs (plus closed windows I don't care about)

- upgrade.jsonlz4 contains 500+ tabs (with container ids, yay), but not the most recent ones of course (plus closed windows I don't care about)

From I saw online it looks like firefox only stores the last 25 tabs in these files, which are the last tabs I actually opened, even if more actually exist. What I really don't understand is : - Why does my upgrade.jsonlz4 file have more than 25 tabs then ? - Where are the other tabs supposed to be stored then ? the .jsonlz4 stores the last 25 tabs, yet firefox (usually) remembers all my 500+ tabs anyway, so where are they stored ?

Also, y'know, pls help me restore my stuff. Thanks.

Problem: Cannot clear history from Firefix Started with Menu and clear recent history. Looked everyplace there was information about history. Tried removing individual entries. Ran Malwarebytes. Dell XPS 8960 with Windows 11 less than one year old. No response with any steps I take. Also, there are no error messages. I am unable to clear history no matter which tools I use. No error messages. All the suggestions I tried had no effect. Used Troubleshoot Mode in Firefox.

Oddly, I tried my older Dell Inspiron 3650, with Windows 10, and clear history works like it should. 

Used Troubleshoot Mode in Firefox. So far, all the advice goes down the same path; history, clean recent history, manage history, etc.. Tried refreshing and today I deleted Firefox app and reloaded. No improvement. Results same with Verify Integrity > Task: checkIntegrity - Unable to fix corruption, places.sqlite will be replaced on next startup > Task: checkCoherence - The task queue was cleared by an error in another task. > Task: expire - The task queue was cleared by an error in another task. > Task: vacuum - The task queue was cleared by an error in another task. > Task: stats - The task queue was cleared by an error in another task. > Task: _refreshUI - The task queue was cleared by an error in another task. Please help... Rangercarol