Firefox Community Forum

I didn't know I need to keep a device on if I want to sync my old data. I read it thoroughly. This is annoying, I don't want to lose my Sync data from this because I didn't know. How do you guys retain your Sync data if I were to reset my password? My computer just got fixed and I don't like this greeting of where all my data like history and bookmarks flushed down because I wasn't signed-in in a device nor did I place a key or something.

You did updates this morning which annoys me anyway. You do updates too often and at the wrong time of day. After you did updates, everything, all my bookmarks, etc. are gone. It's a blank screen.

After being nagged to update to the latest version of Firefox, i did so thinking all the windows and tabs would be restored. I have been thru multiple updates with with no problems in the past. I have been through most of the self help but nothing works. The restore last session is greyed out.

I do not speak geek.

i am currently using firefox 153.0. can i restore firefox windows- and tab-structure as in sessionstore.jsonlz4 from a previous.jsonlz4 originating from a previous firefox version?

My bookmarks list has inexplicably disappeared. It might be related to the fact that I briefly switched to Google Chrome to connect to a Facebook Zoom meeting – although I've done this several times before without any problems. So, what can I do to get my bookmarks list to reappear? I hope it's not too complicated! Thank you for your advice!

Hello, during the last FireFox update a bug happens and make Firefox doing reparation ; after this, my extensions and last session had been lost ; I tried to restore but nothing working, can I cancel the Firefox reparation, thanks for helping Best regards

im trying to restore a session that i accidentally closed. i deleted the sessionstore.jsonlz4 file, copied and pasted the upgrade.jsonlz4-20260715202819 file, and renamed it to sessionstore.jsonlz4. In the new window, all the tabs that were supposed to be restored have been replaced with moz-safe-about:blank tabs. The tab group where i had several tabs is still there on the tab bar. What did i do wrong?

After opening up Firefox to continue work in one of my Saved tab groups, I noticed the 153.0 Update window.

All my saved tab groups have been deleted and the tab group options have been replaced with the new Tab container system in the drop down menu. I even made a new group to test and it saved and was accessible but all the important ones are gone. Nothing in the Json files, tried most of the solutions I've read online. none of these work.

Saved Tab groups don't to sync across devices and are local, so surely they should be saved locally on the system.

Firefox updated and all of my tabs I had open are gone. I used those for organizing and remembering things. There's no option to open recently closed windows. No history of the tabs as a group. What do I do?

So every time the browser crashed or a blackout happens and it forced closed (sometimes the browser is closed normally and it still happens) the next time i start the browser it would show the restore session page. Pressing the restore session would just restore the open tabs and not the tab groups. Because of this i would need to go to the file manager, copy the previous.json and change it to replace the sessionstore. it's kinda annoying. is this problem just me or is this a known issue? also how to fix.

My Firefox crashed and one of my windows with a bunch of tabs was lost. I have a bunch of windows open for dedicated sorting of tabs (one for socials, one for videos, etc). Earlier, my Firefox crashed and it attempted to restore my session but did not restore one specific window I had. I looked in the "History > Recently Closed Windows" and it was not there either. This specific window had a bunch of work related things on it and while I can sift through my history and re-open each tab individually and rebuild it that way, that's really frustrating and time consuming. Is my window just lost now?