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I recently downloaded and installed the update to Firefox browser. After installation I find that all my bookmarks (and I mean ALL) are gone. They are gone completely. First time that has happened with an update. Very frustrating!! I had a lot of bookmarks. Lots of music and specific web sites that I frequently use. Now they are gone. Totally disappeared What happened? Is there any chance for recovery. The installation instructions say that I will not lose any data, etc., etc. And I believed it.

Hi all, I'm using Firefox 140.0.4 (64-bit) on Debian Trixie and I'm getting a weird behavior with the auto-complete functionality of the address bar.

If I type the first character the address gets auto filled (see 20250711_First-character-auto-fill-working.png attachment), then if I type the second character the auto filled result disappears (see 20250711_Second-character-auto-fill-NOT-working.png).

I've tried any search option combination, but results doesn't change. At the moment I'm using for the address bar just "Browsing history" (see 20250711_Address-bar-settings.png).

The correct behavior would be, as in the past, that new characters confirming the address would leave things as they are. Do you have any suggestion on how to restore the original behavior?

Many thanks,

Raoul

My Firefox ver 140.0.4 bookmarks have disappeared on Samsung S25+ Android 15. I thought they might be found under another profile, but Firefox profiles are not supported on Android. I can find no JSON backups either, so it appears that the automatic bookmark backups are not supported on Android either. Any suggestions will be sincerely appreciated. [I did not have Sync set up on my laptop or phone prior to this unhappy event.]

Hello I am trying to send email through an office365 account. Receiving mails with IMAP protocol works. Everything is setted correctly.

smtp.office365.com port 587 STARTTLS OAuth2 username: my full mail address.

Still, not work (I upload 2 screens). And I have other 2 emails account through office365, that, with same settings, work good.

please help me..thank you so much

I have Firefox configured with auto-expanding vertical tabs. Sometimes, when the mouse cursor leaves the Firefox window through the same border where the tab bar is located, the tab bar expands and stays in that state until the cursor returns to the Firefox window. This is especially annoying with two displays; if the cursor hovers over the tab bar right before moving to the second display, the tab bar remains expanded, overlapping part of the browser content.

When I try to run firefox 141.0 (Linux x64) I get:

libxul.so: undefined symbol: gdk_wayland_device_get_wl_seat Couldn't load XPCOM.

Is there a way to fix this?

I'm using Slackware 14.2.

Recently when I load FF, something is injecting what looks like a Yubi Key character string and DUck Duck Go searches for it on the net. I have no idea what is causing this. It happens without the Yubi Key being inserted so is obviously a stored set of strings. I tried clearing the cache and history, but it still happens. Also, for some reason I have to clear the history and cache very often or FF will time out trying to go to a new web page.

Anyone have any ideas?

System is I7 running Windows 11 pro 64. (kept updated) Avast Premium Security and Malwarebytes (both kept updated)

How to whitelist a site to give location access? I have gone to the Location tab in settings, but it will not allow me to enter a URL/domain that I want to whitelist.

I had to reset Firefox because of a hack to my FB account. I've recreated all of the icons I use but Gmail won't add since Google doesn't think my desktop is one of my devices. I can receive Gmail if I use Chrome. I've tried reaching Google by leaving messages @ the Freemont office in Seattle but thought maybe Mozilla had an answer. Thanks for listening.

Firefox is asking for stored payment method information for the user "Carla Clarke" to allow me to sign up for Astrodienst (an Astrology Site). I keep a paper file for a my passwords, but I can't find one for Firefox.

I made the mistake to following Mozilla's advice on why my tabs stopped coming back after I closed out, despite the fact that I had that selected in my settings. Now I'm stuck with an "Old Firefox Data" folder on my desktop and I can't remove it because I need administrator privileges -- but it's my personal PC. WTF

So, I was downloading some Patreon stuff and Patreon isnt well optimized for browsing older posts. When you have to load multiple more pages dating backwards it slows down the Firefox quite a lot, pretty much to the point when the Firefox reach non-responding state in worst cases.

But luckily for me Patreon worked fine for me tonight, just when I was closing the Firefox, it took like 5 seconds for it to close.

I spent some short time by responding messages on Steam and Discord and then I started new Firefox window, this time I went on Netflix and when the page loaded my monitor went black and then after like few seconds it returned back with "Displayport" message on the top left corner.

When I checked Event viewer, there is nothing at all. When I checked about:crashes, there is also nothing.

Any idea what was that and how to prevent that?

this is the third time i have asked this. I love firefox but your latest updates have slowed down firefox and does things on its own like it has Ai. Google changes like this too and I will no longer us google. if nothing else let me download an older firefox. Rich Stonehouse

I use Proton Pass to manage my passwords. This option has mysteriously vanished from available options. Should I simply stop using Firefox? It's not working very well since I have to fight to enter an updated password. I'm MORE THAN disappointed to learn no one is available too help!!!