Firefox Community Forum

Yesterday, I noticed after I closed and re-opened Firefox, my browsing session was completely gone - all my tabs and windows, my entire browsing history, website sign-in status, all completely gone. I've been troubleshooting since then.

I've noticed that the 'sessionstore-backups' folder in my profile folder is missing. When I open Firefox, this folder is created and Firefox writes some data to it, but Firefox seems to delete the folder as soon as I quit Firefox. Firefox should not be doing this. My Firefox is configured to open previous windows and tabs, and is NOT configured to wipe any browsing data of any kind when it closes.

As a sanity check, I spun up a Windows Sandbox (briefly, it's a clean, isolated Windows environment) and installed Firefox there. I also enabled the option 'Open previous windows and tabs'. Firefox behaves normally - it re-opens the tabs/windows I had open when I quit Firefox. Great, that's what I expect. The trouble starts as soon as I sign in to sync. After signing in to sync, and letting the initial sync process complete, I open a couple of windows and tabs, then quit Firefox. Firefox begins nuking my browsing session again - the 'sessionstore-backups' folder is erased, and next time I start Firefox, all my windows and tabs are missing, and my browsing history is missing.

So, at this point, I'm assuming something in my synced data has become corrupt. I haven't installed any new extensions lately. I haven't changed any of Firefox's settings that would cause this to happen. The only thing I have done differently lately was enable Firefox Sync in LibreWolf and sign in to sync there. It seems like this session-nuking trouble started after I signed in to sync in LibreWolf. I assumed, since LibreWolf is a fork of Firefox, and because there were no warnings or indications the feature was incomplete/unstable/experimental/etc., that it would just work, that it wouldn't cause any issues. But it seems like it has caused issues. I checked LibreWolf's issues tracker for anything related to 'sync', but I didn't see anything noteworthy.

I've been using Firefox and Sync for numerous years without issue. This session-nuking thing started yesterday.

I use Firefox in a few places, and based on what I saw happen in my Windows Sandbox, this session-nuking issue is going to happen in every Firefox I'm signed in to as soon as it has a chance to sync. Obviously, I do not want this to happen.

What can I do to determine what the issue is? What can I do to check if something in my synced data has become corrupted? What can I do to reverse it? I'm not opposed to completely wiping/resetting my synced data, but I'd rather not if I don't have to. The only thing I would lose sleep over is my bookmarks, but I know I can export them. Are there any debug logs I can enable/look at? Anything I should look for in Event Viewer?

Thanks.

I have been using Firefox as my primary browser in Windows and Linux Mint for many years, and I have always found it to work when other browsers would not. Recently (last few months) functions in Ancestry.com stopped working. I thought that the problems were within the Ancestry system, and getting help within Ancestry was very difficult. I finally got a help chat session a short time ago and learned that everything in Ancestry should work using the Chrome browser. Very reluctantly, I loaded the Chrome browser on one of my Windows 11 computers, and suddenly all of the functions within Ancestry worked properly. I sincerely hope that FIrefox will soon resume being fully functional with Ancestry.com.

I upgraded my version of Firefox from an ESR version to v129.0.1 on Debian 12. Drag and drop of files from the desktop or the file manager (PCManFM-Qt) into the browser stopped working. It is still working properly in Chrome.

This occurs with several web apps but, as an example, it occurs when trying to drag a jpeg into Roundcube Webmail while composing a message.

No browser console errors are genrated when trying to do this. It occurs in Troubleshooting (safe) mode as well. In apps that pop-up a "Drag files here" target, that target still appears but dropping the file on it does nothing.

The website in question is https://accounts.groceries.morrisons.com/auth-service/sso/login

If I use with the same username and password in MS Edge, I can successfully login. I'm usng the Dashlane Password Mananger

FF 129.0.1 Edge 127.0.2651.105 OS Windows 11 Pro v 24H2 Build(26100.1457)

I am trying to use the tree style tree expansion for Firefox. When I install the tab bar appears at left side as it should, BUT the tab bar appears at the top too. I understand it has to do with the userChrome.css: Questions: 1. The css file is supposed to be created in this folder: C:\Users\jssch\AppData\Roaming\Mozilla\Firefox\Profiles\ 6p6hqx7v.App1d96b2329ff34563bd901f480a66632f\storage\permanent\chrome I that the correct location customized for my pc. 2. Could you supply the correct code for the css file. I am assuming I can use Notepad++ to create the file.

Thank you for your assistance. My email is jsschwab2002@gmail.com

Jonathan Schwab

https://ftp.mozilla.org/pub/firefox/releases/72.0.2/mac/en-US/

Hello, I would like to ask you why i can't translate on greek and russian althought i already downloaded the languages in the translator's settings? Can you help me to fix it.

hi fellas i just bought macbook air 2012 in which OS is high seara and with no updates i want to ask that firefox works on older version like high seara ? anyone with personal experience?

I want to export my bookmarks from a Linux laptop to a Windows 11 laptop. Can they be sync'd? I have tried the instructions from CoPilot on the new Windows machine, but not getting anywhere.

Hello, I use Ufile for my taxes. They weren't bad a few years back. For the past 3-4 years they have been a problem with their website not loading properly. They want you to use Chrome (as do more then a few websites). I don't like Chrome for privacy reasons. What do you suggest I do? Load Chrome for Ufile and then delete it. Can you suggest a tax website that works better with Fire Fox? Open to suggestions. Thanks in advance. Bob

I started this thread because I believe it may be related to these problems/failures I'm having with exporting /importing Bookmarks, uploading images (on this site and elsewhere), which has also on occasion led to crashing my pc. Images from my previous thread auto-uploaded to this thread. I felt it might be better to separate the conversations until we get motre info.

Thru trial and error, it seems all these symptoms I will describe seem to be linked to my sessionstore.jsonlz4 file.

About six months ago I was having major problems with Firefox, navigation issues, broken toolbar buttons, blank toolbar button spots. I first tried to revert to a good working backup profile, which was fine until I did the file transfers from the problem profile to the backup, after which all the symptoms resurfaced in the backup profile. . I do what I always do by transferring certain files, but only those that make the transition without creating problems/conflicts; sessionstore.jsonlz4; places, cookies, etc.

I eventually chose to build a fresh profile, but the same problems occurred after the file transfer. Thru trial and error, I discovered that sessionstore.jsonlz4 was the root of the problems. I eventually went back and used the sessionstore.jsonlz4 from the backup file, but it was a real ordeal getting my session back up to date.

A couple weeks ago I started having problem here uploading images. I would select the file, but nothing would happen, and I was getting all these strange side effects.

But a few days later, Once again, I swapped out the profiles, these sorts of things started happening when I tired to export/import bookmarks

link text

If I move the cursor over the top of the screen, a bit more appears

link text

I'm writing in the backup profile now, because trying to upload from here or from Postimage, generates only these,

link text

or various distortions, i.e., but no ability to go any further in the process

link text

I didn't have any problem transferring the history, cookies, or bookmarks to this backup profile, but how do I go about fixing this without sacrificing the session. Is there a way to import only the session tabs without bringing in the corrupting elements?

BTW, still no "Preview Post" link on this page unless I submit this message first.

hi

i had my all data saved in my firefox online account , now i logged in on my new laptop , i logged in with my id but i cant find my bookmarks passwords , extensions etc . please help

When I open a new page in Firefox, it is always at the bottom and I have to scroll all the way up to the top of the page? Very annoying!

Windows 11, Firefox

Hi, I hit Foxfire icon, I get XUL Runner message,

Error Platform Version 127.0.1 is not compatible with mini version ] = 127.0 and max version ] = 127.0

How do I correct and gain access!!???

Please help, definitely liked days of yore when one could call.

Andrew

Receiving the following error message:

Error: Platform version '129.0' is not compatible with minVersion >= 128.0.3 maxVersion <= 128.0.3

How do I resolve this?

What does the following error message mean and how can the problem be corrected?

XUL Runner Error platform version '129.01' is not compatible with minVersion>=129.0 maxVersion<=129.0

Thank you.

Nora Jones

Although I saw now your warning to create recovery keys. I was unaware in past. Ha dto change laptop and browser didn't let me login by gmail. I created password and saved in firefox itself.Please help if possible to recover bookmarks in my account

So, I'm switching from Chrome and there's this one thing I can't seem to be able to replicate in firefox.

When I start my day I usually open several tabs from different pages of the same website. In Chrome, I would do that by: -typing the name of the website in my address bar -all the pages I frequently visited in that website show in my suggestions -I middlemouse-click all of them, one after the other -this opens one new tab for all of them -I then switch to those tabs and browse them

However, replicating this in firefox seems impossible. When middle-mouse-clicking the 1st link, I would have my window forcibly switch to it, not letting me open the other tabs without changing tabs again. Recently I learned I can avoid this forced switch by middle-mouse-clicking the URL on my address bar while holding shift, which is great! . . . Except it still closes my address bar, not letting me click the other ones without having to type the website's name in it again.

I don't mind holding shift (though I wish I didn't have to) but I really just want to middle mouse click multiple links in my address' suggestion bar and open them in succession, without shifting back to it after each time.