Diễn đàn hỗ trợ Firefox

After a update 154.0.1 and 155.0.1, 64 byt Firefox dod not keep the open tabs once started, but the bookmarks. After searching in Firefox help, neither I could not find a previous bakup folder, before the update data, so I cannot restore the history it manually, so I do not know what to do. It is quite dissapointing as I had dozens of tabs open for diferent putposes, and now I have no one

After closing the records in the window, how many windows can be kept now?

I had 6 windows open before closing my browser, but only 5 were automatically restored after reopening it; there are no other windows in the closing history either. What happened? There are no other windows in the closed history section either. What's going on!?!?

I have recently got a new (2nd Hand) PC,after my old kit became U/S,after an attempted reinstall of windows 10. my current PC 1s windows 11. Is there any way I can Retreive my old bookmarks? I have tried getting them from my old backups,but win 11 shows them as insecure! i would appreciate some help with this problem. Is there any possible way I can retrieve my bookmarks? my old pc was a dell,my new one is HP.

I should mention that I am 81 years old and am dissabled with a long term illness, so I am not computer savvy

Thank you

FF 153.0b4 this time, was only a few months ago when FF did this same thing last time! But now its an updated ver and still messing up! It's getting more bloated (But most software is) and trying to do to much and things are going WRONG alot more often. FF (Mozilla) used to go years between data losses and now it's MONTHS! Get your act together Mozilla.

    FF wasn't even updating it self, and I haven't changed anything in days. Worked fine yesterday but when I opened it today, the 4 windows opened but they didn't want to open there tabs (most of them have less than a dozen). The main window showed my menu bar, recent browsing icon and a mostly blank tab bar except for the new tab on the far right, none of the other tabs were loading or even showing up, but the space was there for them. I even just left it sit there and chew on things for about 15 minutes before I decided to exit out (file/exit) and try again. This time my other 3 windows loaded just fine but the main window with around 2 dozen tabs was BLANK! and NO recovery options! Recently closed tabs does show tabs I closed on it before the meltdown but NONE from the LOSS. Nightly does not show any in the Tab sync either (but it may not have been up long enough to sync). There is a previous window, but that is not the one I need to recover (Ironic that it will save a window with 65 tabs closed a week ago and let me recover it but it won't let me recover a window with only a couple dozen tabs from a couple hours ago). Wish I could remember how to wright complicated batch files, then I could make one that would back up the profiles after I close FF, that way when it screws up I could just copy the last backup in place and be working again. And all I would need to do is just put a time code in the profile name to make incremental backups and decide how long to keep them for with out over writing. SEE how SIMPLE that would be for you to do Mozilla? It's been how many years that you've been working on FF and it's predecessor and still no profile backup and restore? And to make things worse, most of the databases used are encrypted in some way so as to be NOT user friendly. We can't even import an old backup or profile parts if we need to recover something or look at something. You make it SO hard to recover from a crash when one happens (and they happen more often than they used to) and even just to back up our info even if we could recover it. You were a great browser, now you are broken and barely adequate bloat ware and getting worse. Problem is that your still better than chrome and edge crap.

Firefox completely changed overnight without notice and I have lost all my bookmarks and can't find out how to access TV channels that were easily available previously on my desktop. Trying to make sense of changes but struggling. Nothing that used to work for me is still available. I don't even recognise it. Might have to give up Firefox.

I haven't been able to use my bookmarks now for a few weeks and you keep updating but nothing gets resolve. Years ago MOZILLA was great with not issues but lately is always a problem and sometimes is even blocked. Was going on there?

After a recent Firefox update, all of my saved passwords disappeared.

I checked my Firefox profiles and found that the current `logins.json` and `logins-backup.json` files were newly created on August 30, 2026 and contain no passwords.

However, in the older profile data I still have:

• `logins.db` — approximately 480 KB, modified August 19, 2026
• `key4.db` — approximately 288 KB, modified August 18, 2026
• `signedInUser.json`
• `storage-sync-v2.sqlite`

I opened a COPY of `logins.db` using DB Browser for SQLite. It contains:

• 392 records in `loginsM`
• 5 records in `loginsL`

The records clearly contain my saved websites in the `origin` field.

The table columns are:

`_rowid_` `id` `origin` `httpRealm` `formActionOrigin` `usernameField` `passwordField` `timesUsed` `timeCreated` `timeLastUsed` `timePasswordChanged` `secFields` `guid`

The `secFields` values begin with:

`eyJhbGciOiJkaXIiLCJlbmMiOiJBMjU2R0NNIn0`

Unfortunately, after discovering that my passwords were missing, I also reset my Mozilla account password. I understand that this may have affected the server-side Sync data.

My main question is:

Since the 392 encrypted login records are still physically present in the local `logins.db`, is there a supported or technically safe way to recover/decrypt those records and restore them to Firefox?

I still have the older `key4.db` and have preserved copies of all of these files without modifying the originals.

I am currently also attempting Windows File Recovery to look for an older deleted `logins.json`, but I would especially appreciate guidance on whether the surviving `logins.db` can be used for recovery.

Bill

After the most recent Firefox update all my bookmarks were scrambled. For example, when I open one marked Bank of America, I get Go Daddy. How do I restore my bookmarks to what they were before the update?

My PC crashed and then upon opening up firefox it forced me to update firefox. Afterwards all windows and tabs disappeared but my browing history is still there. I tried the in-browser restoration but it is greyed out. I tried the session store backup profile data but has no 'previous' or 'back up' files, only 'restore' files that are empty and restore to no tabs or windows. What other ways are possible? It's weird my browsing history anf bookmarks weren't deleted at the same time.

Bought a new Macbook Pro with 26.6.2 and need to transfer all bookmarks from old Macbook Pro 10.14.6, I tried exporting the profile from the old Macbook but it did not work.

I can't restore my tabs and groups from the last time, the last time i used to have a lot of tabs and groups of taps for my studies and the my mac wanted to do a u[date so it shut all apps running in inculdeing firefox and I can't recover them. even so it's not shown in the browsing histroy

The newest Fx update created its own dysfunctional 'profile', which omits ALL my extensive, carefully created bookmarks! I found my backup bookmarks .json file, but cannot find any way to get Fx to import that file. HOW can this be done? I have lost the entire afternoon with this stupid problem, when I have an enormous amount of important work to finish. Why does Fx not retain (e.g.) bookmarks when IT makes 'new' profiles ????????? This is the first complaint I've had about Fx. Otherwise it's been fabulous. K.R. Westphal

My mac froze, force quit did not work, unplugged it, turned it back on, all bookmarks were gone and not able to add new ones. Would like to restore old bookmarks and add new ones.