Forum der Gemeinschaft Firefox

So, whenever my Firefox updates, it seems that it completely wipes my history, and deletes all my tabs, despite it being set to "re-open previous tabs on launch".

This has happened multiple times now and is really not fun. Do I just need to make bookmark folders for everything I do? Because having everything randomly delete itself, without even a session restore in the backups folder of my firefox profile, isn't ideal.

I do have a sessionstore error for this, where I presume the problem is laid out.

1784409622095 SessionStore WARN SessionWriter.write, Caught exception:: NotFoundError: Could not move `C:\Users\SUCKS TO SUCK\AppData\Roaming\Mozilla\Firefox\Profiles\sphzxgst.dev-edition-default\sessionstore.jsonlz4' to `C:\Users\SUCKS TO SUCK\AppData\Roaming\Mozilla\Firefox\Profiles\sphzxgst.dev-edition-default\sessionstore-backups\previous.jsonlz4': source file does not exist (NS_ERROR_FILE_NOT_FOUND) No traceback available 1784409622095 SessionStore ERROR Could not write session state file : NotFoundError: Could not move `C:\Users\SUCKS TO SUCK\AppData\Roaming\Mozilla\Firefox\Profiles\sphzxgst.dev-edition-default\sessionstore.jsonlz4' to `C:\Users\SUCKS TO SUCK\AppData\Roaming\Mozilla\Firefox\Profiles\sphzxgst.dev-edition-default\sessionstore-backups\previous.jsonlz4': source file does not exist (NS_ERROR_FILE_NOT_FOUND) No traceback available

HI All Recently purchased a laptop and want to have FF sync with my desk top. I am signed in to both devices with the same account and have checked all settings on both and they are identical. Why are they not syncing?

Background: On August 6th morning EST after the August 5 2026 update, attempting to use firefox lead to the window with the "end process" button so I had to close the browser multiple times and then the next time I opened firefox, the bookmarks and history were wiped. I was able to restore using a backup saved on the computer and continue as normal (aside from losing some Cookie Clicker progress, reinstalling Tampermonkey userscripts, and redoing browser extension settings) but now there's an issue with trying to backup firefox data.

Issue: Trying to back up my firefox data leads to a "There was a problem backing up. Try again in a few minutes."

When going to about:config and typing browser.backup.backup-debug-info, I get {"lastBackupAttempt":1786243812,"errorCode":9,"lastRunStep":13}

When looking at Broswer Console, there is an entry saying BackupService: Could not create C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini: NotAllowedError: Could not write to `C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini': failed to open file for writing (NS_ERROR_FILE_ACCESS_DENIED) BackupService.sys.mjs:4116:23 but I don't know how to address that.

I use a paid for subscription to Gemini AI. It often creates "visuals" for me apparently using JSON code. These do not show up at all. Moreover, the buttoms and other UI controls do not display well in Firefox. Is there a way to fix this?

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?

huff post On MBP Firefox huff post web sight only accesses headline story and “ live updates banner scroll “ and “on this date….on huff post”, no other parts of the site.

MacOS 26.6, Latest Firefox. 153.0.3. Tabs are not restoring, since update to latest FF. Tab History shows old stale tabs, not the tabs that were present at time of exiting Firefox. I had closed those tabs. Is this an artifact of caching?

The active tabs should be stored at FF shutdown, not the old closed tabs prior to that. This Firefox quirk is both on my Mac Mini M4, and on my MacBook Pro M3. Kind of a pain in the neck to restore where I was. It's enough to make me reconsider this browser - which I have used for decades, using Windows, Linux and now MacOS.

I researched how to restore a session. It told me to go to History and click Restore Session. There is no line with that name, in my Firefox, on a Mac.

Under History the docs show 4 items before "Clear recent history...", I only have 1. Recently closed tabs 2. Recently closed windows 3. Search history. There is no Restore session.

The tabs that were open last session are in the start up window, and the check box is set to restore tabs and windows. But my tabs were not restored. (I only had a single window open.)

What can be done to "restore" previous behavior of Restore Tabs and Windows? Thanks for any and all assistance.

Hello! I'm working on migrating a very old version of Firefox to a newer version, and the number one thing I want to make sure stays is the logins file(s). I went to export the CSV, and the `about:logins` page is blank! Despite this, both the key and logins files are populated, and the browser still autofills in each login as if it wasn't there. To mitigate this, I tried to export the .csv of all my logins, but it doesn't actually export. I'm not sure how to check action logs with Firefox, and I would like to grab the passwords, so I can migrate properly. Any advice would be appreciated. Thank you!

TL;DR: I am dumb, but not an idiosyncratic web browser user, and it was too easy for me to accidentally permanently delete all of my browser data. Deleted profiles should be moved into system trash when deleted, not rm'd entirely.

I have never used "profiles" and somehow, after updating firefox, seemed to have created one. I have no interest in using the feature, and therefore went to delete the new profile and disable the feature. Somehow, I instead deleted the profile I had implicitly been using all along. I clicked too hastily through the warning about deleting files, because it simply did not occur to me that deleting something related to this net-new feature should clear all of my *old* data. My goal was to restore the experience I've had in firefox for years (without profiles), but because I failed to adapt to the new feature, I lost everything instead.

I apologize for maybe shouting into the void about this, but I am posting on the off chance that this will reach someone who's involved in the implementation of these features and can save some other dumb person like me from making the same dumb mistake. It's quite painful to suddenly lose years of accumulated bookmarks, extensions, history, etc. The easiest and least intrusive solution would be to always move profiles into system trash when they are deleted, and never permanently delete them.

How do I remove a second VPN account? I have many email accounts, and last year there was confusion. MY ONLY intended account is associated with: [redacted] @gmail.com'' I am to be billed later this month. Please check, and remove any and all other emails associated with me! Thanks! SJ

In this version of Firefox 152 for windows I'm currently unable to remove search related to google, ebay, perplexity and bing.

Please return possibility to remove those completely!

I don't want my browser to have anything to do with those listed above. I have had it removed in previous versions. Why did you add it to browser again?! Why don't you allow to remove it anymore?!

For the last two or three weeks, when i open a tab that I have entered the URL for, a second tab opens right next to it advertising some service or advertising something. I don't know why this started and I don't know how to get rid of it

I have my settings set to open PDF files in Adobe Acrobat, but the latest version of Firefox has started opening them in their own viewer, which is NOT near as useful, and I then have to download it to open in Acrobat like I used to do. Why? Is there any way to fix it back?