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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.

Hello all, i have a bit off an off one. I had a usb keyboard plugged into my laptop and and it had something sitting on it, I forgot it was there. I was using the laptop normal, and usually i use the CTRL and wheel on my usb mouse to zoom. But because of whatever buttons where pressed.. IT DELETED TABS(quite a few!)more thank the recent closed tabs could handle... i tired to do the session restore thing but im not super tech savy and messed that up.. But i do still have a copy of the json file thingy, but the backup thing got over written.. can i still recover with the one copy. The instructions are not the easiest to understand. Please help, i dont research and its been hard gathering that information. Thanks and if you need any more info just let me know!

Hi,

I had Firefox tab syncing set up on my phone, and the synced tabs were showing up fine on my other devices for a while. About 3 weeks ago, that phone was lost (long story — it ended up in a river) and I haven't been able to sync from it since.

Now the synced tabs from that device are no longer showing up on my other browsers, and I need to recover some important information that was in those tabs.

A few specific questions:

What is the current official expiration policy for synced tabs data (as of 2026)? I've found conflicting info in old forum threads — anywhere from 1 week to a year depending on platform and Firefox version. Is there any way to see whether my account still has cached tab data for a device that's been disconnected/inactive for ~3 weeks, even if it's not displaying in the normal Synced Tabs view? If the tab data has expired, is there any other server-side record (even temporarily) that Mozilla could check on the account side that isn't visible to me as the end user?

Any help checking the account status directly, or clarifying the actual current retention window, would be a huge help. For my email address, please request below.

Thanks, Ebe

About one to 3 weeks after I switched from windows, Fire fox changed my browser, and I lost all of my data. I hate my new browser, I am so mad That I reported this to the FCC. I already view all Info. nothing helped.

Per Updates critically important open tabs were no longer accessible following the Updates in question. I need to recover the missing activity-chronic or request that the unfinished activity up to the point of Update be retrieved.

I am looking to Restore yesterday Firefox have lost all my pin tabs when I opened this morning the browser how can I get my old stuff back? Please help me out. Thanks

My old laptop died, stranding my Firefox profile (including bookmarks and Login credentials for many sites). I am able to connect the old laptop's HDD via USB to port the old profile data to the new laptop, but I am afraid that copying the older files to the new profile will overwrite the newer profile data. I would like to create a second profile, in which to store the old data, in the newer laptop's instantiation of Firefox, but I don't see any information online about doing this. Is it possible to create multiple profiles in Firefox for this purpose? Thank you

I have two issues: One is figuring out how to remove what FF is storing on my device (an android phone). Clearing the cache does not do it. When I go to the menu, then privacy and security, which on my device is a title of a section, there is no cookie removal option. It is cookies and site data which is kind of annoying. I don't want ALL cookies deleted. I don't want signed out of all sites. I just want the 700 some odd MB's that FF is storing on my device gone. I would like to see what is being stored, and delete what is not necessary or useful. Does anyone know how to do that?

My second issue is that each time I update ff, all of my extensions, bookmarks and passwords disappear and I would like that to stop happening. I would like to know how to recover them. It is time consuming and frustrating to have to redo all of that each time I update ff, and some of it inevitably gets lost.

Thank you for any useful suggestions.

I opened Firefox this morning and there were no bookmarks or history. After looking online, I came to the conclusion that I needed to find the places.sqlite and bookmarkbackups files and folders. However, I can't seem to locate either.

I am running Firefox v153.0 (aarch64) on Mac OS v. 26.5.2

I have Time machine backups, but I need help locating the correct files to restore. Thank you.