Firefox Community Forum

I use Firefox (the current version) on a Dell Windows 11 Pro laptop. I have around 8800 bookmarks, and I've lost around half the tags on my bookmarks. (The bookmarks themselves are OK; I'm losing about half of the tabs.,) This has happened to me twice recently, and I'm restoring the bookmarks as I write these words.(after I'm finished, I'll save two copies of the HTML file for backups. Can anybody tell me why this is happpening, aaand How I can prevent it in the future?

Thanks.

My bookmarks have disappeared. The solutions do not seem to work. It may be due to Avast Secure Browser trying to take over. Will they come back if I uninstall that?

This morning this was at the top of my screen when I logged into my computer. "For quick access, place your bookmarks here on the bookmarks toolbar. Manage bookmarks..."

I did click on it however nothing happened or so I thought. I later go to the upper right hamburger and click on it and go to the bookmark tab only to find all my bookmarks are gone.

Can anyone tell me how to get them back since that is my quick access to my business sites? Is there a way to find them or are they just gone?

I cannot get the tab to stay out so I can take a screen shot. Sorry.

Any help will be greatly appreciated. Thank you.

Hello, I use Windows 11 on my PC in France. I lost all my Firefox bookmarks and browsing history some time ago. When I try to use Firefox I get the message : Firefox is not operational because one of the Firefox files is being used by another application. I have tried to get an explanation on firefox.fr but to no avail, their support page is far too complex. I can still browse with Frefox but no bookmarks, so it defeats the purpose... Please help if you can as I now have to resort to Google Chrome, wich is not as versatile and I would really like to be able to use Firefox again. Thanks. Raymond

I lost my entire browser (bookmarks, extensions, accounts) by opening firefox twice. Whilst firefox was opening (very slowly due to my wifi) i opened it again, thinking it may have crashed, next time i opened it my entire browser was gone. How can i recover my data?

For the past, about 9 months, every time any update is applied to my Firefox browser, I loose access to my Bookmarks (approx 10 years worth) and have to go through the tedious process of copying, renaming, moving, restarting etc. Is Mozilla going to fix this issue soon or should I just resign myself to having to check my bookmarks every couple of days or so to see if they still exist.

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.

Firefox suddenly reset to a fresh install state: only default bookmarks, my custom ones are gone. No sync enabled. No manual reset/refresh/reinstall done. Tried: Restore from backups (none recent), about:profiles (only new profile), checked bookmarkbackups folder (empty/old). Please help recover bookmarks if possible. What could cause this? Any recovery steps?