Firefox Community Forum

I deleted a profile not knowing it would delete everything I had. How can I undo it? I didn't want Firefox Profiles, it was forced. I deleted it, and everything just got deleted. Can someone please help revert this? Thanks.

My computer ran into an error and restarted and I lost my entire browsing history, bookmarks, extensions, etc. Now I have nothing saved and the only browsing history my computer is showing is when I briefly opened microsoft edge. I regularly used duckduckgo, so most of my data is gone. Is there anything that can be done or is it just gone.

I have enabled the option to open the previous windows and tabs. I had one window that I always closed last as it had a lot of groups that are important for my work, so it used to open every time I started Firefox. Sometimes, even if I closed the window by mistake without closing other windows, I was able to get it back by pressing ctrl+shift+n.

But yesterday, I might have closed it by mistake and when I pressed ctrl+shift+n , it didn't come back. I wasn't able to access my window and now it's all gone. I don't see anything in recently closed windows in history.

I need those tabs back as they are very important for my work. they were a lot of tabs. I had many groups but now all are gone. I tried by using the previous.jsonlz4 in the sessionstore-backup by renaming it in the default-release profile as sesstionstore.jsonlz4 but still wasn't able to access my window.

I didn't clear my history as the tabs opened in the window still show up in the history.

Kindly help as soon as possible

Mozillers,

I depend heavily in my environmental and other work on Firefox and am grateful for its ability to restore previous tabs when my laptop, not infrequently, stops working abruptly.

Now the much-used bookmarks have disappeared. A search site states promisingly:

"To restore Firefox bookmarks, use the built-in backup feature by going to Menu > Bookmarks > Manage Bookmarks > Import & Backup > Restore, then select a dated backup or a manual file (like a JSON backup) to bring back lost bookmarks..."

But my Firefox's Bookmarks drop-down menu has no Manage Bookmarks option. PLEASE, what must I do?

Elsewhere I managed to find this file which apparently contains recent bookmarks:

"C:\Users\User\AppData\Roaming\Mozilla\Firefox\Profiles\unk14jlv.default-release-1647366062305\bookmarkbackups\bookmarks-2025-12-26_95_4IdGtYxezJpwuH1UIiT1bRwe1K6bcGO8rv0mqa9rUWU=.jsonlz4"

But attempting to open it with Applications\firefox.exe (default) accomplishes nothing.

FOOL-proof instructions would be wonderful. Thank you.

My mac froze, force quit did not work, unplugged it, turned it back on, all bookmarks were gone and not able to add new ones. Would like to restore old bookmarks and add new ones.

Can Firefox do anything to recover all of the downloads I'd saved until I accidentally had CCleaner erase everything? I don't know what else was deleted, but getting them back would be a big help.

Old laptop died , its not repairable, but the SSD Hard drive is OK , all the data on it and software is intact , but only thing I cant find or access is Firefox bookmarks and thats bad as i use them for my work ...what can i do to recover my bookmarks ???

Hello there, today was released a new version of firefox. downloading it not only crashed my computer, it also removed all my history and bookmarks. is there any way to revert this?

OMG someone please help me...I have used Firefox forever as my work browser. I have saved passwords to client accounts for 3rd party sites, etc. It has EVERYTHING. I updated my Mac with the latest software install today and when I opened Firefox it didn't restore my tabs. I got stuck in a loop where it would not update to the current version of Firefox. I uninstalled Firefox and re-installed it and LOST EVERYTHING. I AM FREAKING OUT because all my bookmarks are lost and I don't even know what they are - I have tried to restore bookmarks and it goes back to 2022 and 2023 and when I restore nothing happens. ANYONE SOMEONE please tell me you know how to help me find my stuff otherwise I am cooked.

I've tuned in to Firefox this morning to find that I'm kind of shut out, no access to my usual apps, and required to enact some difficult backing up etc. When I explore, it seems to relate to Windows 10 losing its backup from Microsoft. But I'm running Windows 11, not 10. What's going on? Is this legitimate? If so, why is it complicated and why wasn't it forewarned (by Firefox)?

Zniknęły mi zakładki (nie ma ich ani na pasku, ani jak wejdę w zakładki- w ustawieniach i w zarządzaniu zakładkami). Hasła te co były zapisane mam dostępne na moim koncie.

My Firefox book marks have disappeared. The toolbar is open but has nothing to display.

I've gone to my Firefox Library window, but the entire page is blank. The table gives no entries for Name, Tags, or Location. Lines below (Name, URL, Location, Tags, and Keyword) are empty.

Searching my MacBook Air I found my Firefox Profile folder. In it there's a folder ending in "default-release". That folder contains a folder called "bookmarkbackups" containing files with titles indicating recent backups.

How can I restore my booksmarks?