Diễn đàn hỗ trợ Firefox

bold textWhen I opened my computer this morning without warning the Firefox had a new default page and all my information was gone. I've tried deleting and redownloading and trying to follow the instructions on how to transfer the information, I could not get anything to work. I know I'm doing something wrong but have no ideas what I am suppose to do. Very disappointed I had some importat information on the desktop and would like to get it back.

My browser updated to 149.0.2 on Windows 11 early April 2026. I first noticed the browser asking me to select a profile when trying to open hyperlinks from emails, but since I had not closed the browser since the update, I still had all of my information. When I went to restart, I was forced to make a new profile as no other ones were recognized. This also happened during an update at the end of 2025 and I was able to fix it with advise from support articles., Unfortunately, none of those fixes seem to be applicable anymore. Does anyone have a current fix? I have lost so much saved info!

Today, after the last update of the software, I lost ALL my tabs (2 years of materials) and there was no way to recover them. Furthermore, I had to spend hours to retrieve at least the most important tabs I use for work.

This is not acceptable, please fix this issue and make the recovery of tabs possible and easy.

okay firefox crashed ive been using it for 3 years on steam os . it ussually crashes normally if that makes sense but this time it went poof . it saved one window containing all my browse history bookmarks dverything , i succsessfully transfered the crashed windows to kate windows containing 2.1 megabytes of extremely important data - riht before it crashed again. i am extremely frustrated , it erased all knowledge of me ever being on firefox erasing history bookmarks log ins everything. it is extremely imperative that i get these windows back . ive been battling with ai to fix the problem my last resort is you guys the ones who made firefox. id like to think you guys built something for this exact occasion . please help, you are my last resort and i would be overjoyed if you can help , thank you ,

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Logged on to find this message. Followed "Fix" set as best I could (I am puter dumb) with no joy. "Manage Bookmarks" is completely blank. All wits end, Please HELP!

So before few days firefox decided to automaticly update. after thet no pasword was saved in system. undery system data 2 files: logins.json-1.corrupt/json-2.corrupt without any data in files (but size is 130KB). i need these logins ASAP.

I was switching computers and created a backup file. The type was html oddly. I tried to restore this backup on two different computers and both times it fails during the restore process without presenting a useful error message.

I can only guess that the file is corrupt, but it is only a guess since the error message is useless. It also seems strange that the backup didn't produce any errors (manual backup). Any suggestions?

My Macbook wasn't responding, so I restarted it and force quit all applications. When I opened Firefox again, none of my bookmarks showed on my bookmarks bar. The bar itself is not hidden. I checked to make sure I have the same profile I always use open and I do. I also tried to go into Bookmarks, Manage Bookmarks, Import, but nothing is available to import.

There was an update with Mozilla Firefox on the 8th. I had tabs open on the computer. After the update, I could not retrieve the tabs I had open. Tried to restore and nothing worked. Is there any way to restore my tabs?

When accessing my bookmarks list, I clicked on the wrong location and my whole list of bookmarks disappeared; left me with tabulated folders. How do I get my list of bookmarks back?

all your articles on 'Session Restore' or Restore Browsing History, are GOBBLEDEGOOK! links that do not work or are incorrect information! Steps which do not work or lead to a previous page which was not helpful ! " Recently Closed Tabs" or History will NOT open the latest tabs. Click to ??? "whatever" is incomplete 'cause you do not tell us WHERE IT IS LOCATED. Backup" is assumed by you, but no information to set it up! Bottom line.: when Firefox crashes, we [the user] is screwed!!

I removed the solid-state SSD drive from my physically-broken Windows 10 HP laptop and connected it to my new Windows 11 HP laptop using an external adapter, wanting to move the contents to my new machine. But already I find that only about 3/4 of my bookmarked browsing favorite sites and document files are among the items that I can find on the old, externally-connected "D" drive (D:>USER>OWNER>FAVORITES). I tried visiting some of the bookmarked sites and hitting "bookmark this page" for each, but then none showed up on my new Windows 11 machine's firefox browser bookmarks sidebar. Perhaps they are being put elsewhere because I am opening these sites from my old drive??

I probably need to first understand if and how much that the two drives are still operating separately, so not cooperating with each other in the way I had hoped. I know next to nothing about any of these things but have used the Firefox browser and documents files for many years without too many issues.

I had two Firefox tabs open in my lower task bar. I closed out one but it was the wrong one. The one I unpinned has all of my tabs, history and book marks. I can't figure out how to recover it.

Firefox unable restore session when switching profiles and instead opening apps installed on the profile I'm switching to.

I have installed Whatsapp web (web.whatsapp.com) on "Profile 1" as a Windows app.

I have some tabs open in "Profile 1" and I switch to "Profile 2" and close the "Profile 1" window with "X" button of Windows 11 but keep the Whatsapp window open.

When I open the "Profile 1" from profile menu, my expectation is that, those previous tabs should be restored, but firefox is opening the Whatsapp web app/window.

OS: Windows 11 23H2 Firefox: 152.0.4

When browsing between two screen, all my saved Firefox tabs disappeared. I have restarted my computer but they do not reload. I really need them (and have not accessed some of them in several weeks so it will be very hard to recover from history.) WHY did they go away and I do I restore them?

I'm fed up with firefox. It seems almost every update deletes old passwords or creates new profile (which effectively deletes the passwords!)

I've tried looking at about.profiles which seems pointless - the active profile does not have my passwords and the inactive profile does not have them either.

If you can't secure passwords what's the point of your browser??

I'm moving to another browser which can guarantee the security of my passwords.

Meanwhile, I must visit every site I use to reset my passwords - what a chore!!!

I had an unusual system crash, and when I restarted Firefox, the History > Restore Previous Session feature was grayed out. Due to the nature of my work, I had a large quantity of tabs open at the time of the crash (please don't judge). I then backed up the contents of the \Library\Application Support\Firefox\Profiles\[session].default\sessionstore-backups\ folder, but unfortunately not the full Profiles folder content. The file recovery.baklz4 does seem to contain my open session info (I can see a recent link in it). Based on web advice, I then tried restarting Firefox, but that didn't solve my issue. I also tried copying in sessionstore-backups files, without success. I then tried the "Session History Scrounger" web application to try and recover links from the contents of recovery.baklz4 because that worked for me in a prior crash years ago, but it doesn't seem to work properly anymore (it only retrieved 4 web pages). Appreciate any guidance as to how I can use my backed up sessionstore-backup files to re-enable Restore Previous Session, or alternatively to scrounge the links that were open at the time of the crash. Greatly appreciate your help! (Please do not suggest using "Show All History"... I have no plans to sort through a dump truck of rice with a pair of tweezers.)