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個人的にFirefoxの過去のアクセス履歴が欲しいため、毎日places.sqliteのバックアップを取得していました。 先日、バージョン154.0になった時点で、突然それまで利用していたアクセス履歴やブックマークが使えなくなり、バックアップしていたplaces.sqliteファイルをコピーしても同様の現象が起こってしまいます。

詳しく調べたところ、どうもバージョン154からplaces.sqliteに格納されているテーブルの構造が変わっているようで、アクセス履歴などが消えた理由もそこにありそうです。

今後も過去のアクセス履歴は利用したいため、直前のバージョンのplaces.sqliteを新しいバージョンに移行する具体的な方法について、もしご存じの方がいらっしゃったらご教示お願いします。 （sqlite managerなどツールを使ってのインポート／エクスポートは既に試しております）

I just read what I think addresses my problem but I'm too thick to Understand it all. My goal is to make my android browsing as private as possible without messing anything else up. Obviously I failed. In trying to do that I made it I made my bookmarks unreachable. What can I do to start over? Gary

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.

Firefox is always displayed on an EXTENDED External Display. When I flipped a circuit breaker to work on a lightswitch, the EXTERNAL DISPLAY lost power, but the laptop which runs Firefox continued uninterrupted. When I restored power, Firefox had LOST ALL OPEN TABS - there were probably 50-75 tabs that opened every day when I started Firefox. Now I don't see a choice to ReOpen Last Session or anything else that looks like it would restore all the closed tabs. All the choices in Recent History seem to be what was browsed yesterday, day before, etc, but NOT all the tabs I routinely left parked OPEN every day which were open for months - the ones that opened every day when I opened Firefox. Are these tabs stored somewhere where I can recover them. I'm running firefox on an HP Laptop PC with Win11 Pro.

Please give me a simple step by step breakdown of how to solve this. I am AuDhD, and am trying to use digital technology to assist with my problems with executive function. Internet security requirements seem determined to stop this, by not consistently saving the data I expect them to, and then asking for it when it is too late for me to have realised I needed a 3rd party solution. I don't think I should need several products to achieve this very simple goal, but neither Google, Mozilla, Microsoft not Opera seem to agree This is now causing distress and taking a huge amount of time to try and resolve with companies that profit hugely from their customers, but refuse to talk to them directly.

I run normal firefox on linux. Fully up-to-date. Every time I quit the app, it reverts to a version of my profile from a month ago, and loads all the tabs I had open then, and then receives all the tabs that I sent to the device in the interim (~1 month). As I speak, it just caught the 60 or 70 tabs in this window.

I tried changing the name of my profile folder to randomstring.defaultOLD and changed one of the backups to randomstring.default. This didn't change the behavior. I'm still stuck in the loop. I saved my tabs with onetab, because firefox isn't remembering my session anymore. I thought it was something to do with updates, like it only loses its mind upon updates, but that's not true. It thinks it's updating firefox EVERY TIME, because the one time it's loading to 1 month ago it was updating, but I'm 100% sure there are no updates to firefox in my linux. It's just hallucinating.

The articles on restoring from backup are outdated. They say to use an html file. There is no html file. It's just folders for profiles, not html files. HELP!

Subject: Help recovering old Firefox Sync data using my Recovery Key

Hello Mozilla Support,

I’m trying to recover my old Firefox Sync data, especially my bookmarks and saved passwords.

I still have an Account Recovery Key that I saved on August 27, 2025. However, after signing in to my Mozilla account today, my account page shows “Account recovery key: Not set”, and syncing does not restore my old bookmarks or passwords.

I may have reset or changed my Mozilla account password today without using the old Recovery Key during the process.

Could you please confirm:

Is there any way to use my old Recovery Key now to recover the previously encrypted Firefox Sync data? Is the old Sync data still retained on Mozilla’s servers in any recoverable form? Is there any other recovery procedure available for bookmarks, passwords, or previous Sync data?

I still have access to the same Mozilla account and the original Recovery Key file. I will not send the Recovery Key itself unless there is an official secure procedure that requires it.

RE: JBR posted an answer to your question "All bookmarks disappeared. I found my json backup files. How can I import this file into Mz, now that it has created a new, dysfunctional 'profile' ??"

Today's update to Fx re-established the link between 'import' and my .json backup files of my extensive, organized bookmarks.

My genuine thanks to all involved in this crucial repair!! Ken Westphal

Sorry to add to 'questions', but once signed in, I could not re-locate the 'thread' of my exchanges with JBR.

Firefox wanted to up date and I clicked okay. All my information still to be as it was but it didn't download when the computer came back up. How do I get everything back?

Update downloaded a few days ago, I closed Firefox to restart with updates and I can't get my previous session back. I even tried my OneTab to see if I could get older stuff back and it's lost that too!

I bought an iPhone and an iPad and I’ve never used Apple products so when I downloaded Firefox to use on these I had forgotten my password so I created a new one but I’ve lost all my bookmarks and stuff.

Well now I think I might remember my old password so how do I go about trying to get all my old stuff back because I’m I’m basically I’m an old fart and I can’t remember all of the websites that I had bookmarked

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

Acer Aspire 5 laptop. Windows 10. Auto turned off because I unplugged it to move places and it has a dodgy connection so if the screen physically moves a bit (like closing and opening movement) it just auto turns off - the screen accidentally moved a bit! I restarted it but only used it to connect to the scanner and save the scanned doc in Documents - I didn't use the internet so didn't realise the tabs didn't re-open as normal. Next day, I realised the many tabs and a few windows weren't opening in Mozilla Firefox. They were also off in Chrome but I could recover those - and it was just one window and a handful of tabs. I did a restore last session, which was dated as a couple of days previously, but the Firefox windows and tabs were still not there when I restarted. I certainly wasn't asked nor were there any warnings re saving tabs etc Firefox has just done an update (auto). I've looked around but see no solution. I don't have my laptop synced to any other device. I thought I had a back up / remember things for in case of crashes but it seems not. What do I do to recover all the tabs and windows? Thank you.

Thank you to JBR, who posted an answer to your question "All bookmarks disappeared. I found my json backup files. How can I import this file into Mz, now that it has created a new, dysfunctional 'profile' ??"

Unfortunately, the reply does NOT help. I have been through all the posted replies to missing bookmarks, and NONE help.

On my own, I found the bookmark backup files, and noticed that ONLY the newly imposed profile has any of those files. So I have access to those .json files, but my question remains: HOW to get that file back into Mz????? None of the posted replies, including your own, even pose this question. In short, after the newest Mz update, the 'restore' or 'import' bookmarks function(s) DO NOT WORK AT ALL!!!

I am sorry, but this problem appears to have been caused by Mz and its latest update; it's for Mz to fix, ASAP !!!

Perhaps I should mention, I'm far from computer- or OS-illiteracy, and am getting ever more fed up with software 'developers' who keep adding more bells and whistles which degrade functionality. I'm a long-standing touch-typist and am significantly faster than any OS's directory trees. Forget AI, I've no need of it.

With sincere best wishes, despite my current frustrations,

Ken W.

the new Firefox was delivered without my permission. It is ugly in the green frame. The bookmark tool bar is nowhere to be seen. I cannot work without the old toolbar as No I have to find passwords and addresses for about 12 VERY IMPORTANT SITES I NEED EVERY DAY.

Hello,

I keep running into an issue where my group of saved tabs disappears.

I will make several groups of tabs. When I right-click and press "save and close group," to shut down my laptop completely. There are many times when I return and try to access the saved group of tabs using the drop-down arrow at the top of the browser; all the saved groups will be gone.

Normally, I find them under "Recent Tab Groups". There have been many times when they are completely gone. Is there another way to find these groups of tabs or are they disappearing completely are a certain amount of time has passed?

Thank you,