Firefox Community Forum

i have deleted Firefox and reinstalled it. after logging in with my account i don't seem to have any details with the browser. it is fresh like new. i have tried syncing it but it is still blank as possible

I am trying to sync my computer and phone and it sends a code to my email address. but out of the 3 times I have tried I have received 2 codes but at least 20 minutes after sending so I cannot use them. I am using Thunderbird for my email

Able to sign in to Mozilla account, but cannot find Sync anywhere. Sync is OK on multiple other devices. System also seems unable to load 140.10 esr. Is it possible to sync on esr versions?

I have many computers that I put Firefox on, and had no problem getting my bookmarks on them as long as I sign in to my account. However, I just had my desktop redone (that previously had Firefox) and now, after I have downloaded Firefox, I cant get my bookmarks when I attempt to do the syncing. Please help

I cannot log into my account and synchronize my data, logins and passwords. I downloaded the latest version of the browser on the official website. Below I will send screenshots proving that there are no buttons or anything that would indicate at least the slightest login to your account. BUT YOU'RE SHOVING YOUR ****** AI BOT EVERYWHERE.

Moderator note: "Edited for language"

You need to enable me to sync the desktop to my mobile phone. I've had mozilla firefox on my Mac and android phone for years but now I am expected to work out how to create a back up and then delete all of my data and trust it will upload to the new browser on my desktop -- which before the update held the same data. Really unimpressed. Get it sorted.

I purchased a new Apple laptop, a MacBook Neo, & need to import bookmarks from my old MacBookAir to the Neo. No success thus far after going to Mozilla article "Sync bookmarks...." & following those instructions.

I am trying to sync FF to a new pc laptop from my old pc laptop. I am signed into FF on both devices, but they won't auto sync, even when the (orignal) says that it is. My old laptop is still running on Windows 10. Could this be the reason? If not, please advise how this can be accomplished.

Hi Moz Support,

I've had this happen several times before, but this time it really annoyed me.

I sent tabs from one Firefox instance to another on another device. I closed these tabs on the source device. These tabs were quite old this time, I'd not opened them in a while - this becomes important later.

On the destination device, let's call it "madbilly's destination Firefox", these tabs didn't arrive. After doing a couple of tests where I sent a tab from my mobile to this instance, I realised that this was a similar problem to what I'd had before, which is one where a Firefox instance/profile for some reasons "resets" itself and it seems to create a new instance in Firefox Sync. Tabs which have previously been sent to "madbilly's destination Firefox" don't arrive, because (I think) it's not registered in Firefox Sync as the same instance. These sent tabs, if closed on the source instance (which I did) are lost, unless one reopens the source instance and Ctrl-Shift+T reopens closed tabs. Unfortunately, in this case because the tabs were old and I hadn't opened them for a while there was no way to do this, because Firefox doesn't remember closed tabs which are not stored in memory (another bug, any fix?), except for looking in old session store backups which I'm going to do after I write this post, though I don't know if that will work.

Also, on Android, because it only remembers 10 closed tabs it's not really feasible to retrieve lost sent tabs this way either, and as there's no access to the session store backups the tabs are definitely lost.

Oddly, when this happens "madbilly's destination Firefox" usually appears twice in the send-tab-to menu, but in this case it didn't. To be able to send to this instance I had to sign out of Firefox sync on this instance and sign in again. Then the same instance appeared twice in the sync menu, the old one being now unreachable.

I'd like to know: 1. Why does this happen? 2. How to avoid it happening? 3. Is there a bug registered about this? 4. When will it be fixed and prevented from happening again.

I generally find that this happens when a Firefox instance isn't shut down properly, which on my old desktop I put down to it running out of resources, but on this shiny new laptop from work that doesn't make sense.

All help much appreciated thanks :)

Download FF install sign-in > said success then show warning

``` Are you sure you want to sign in to sync?

A different user was previously signed in to sync on this computer. Signing in will merge this browser’s bookmarks, passwords and other settings with xxxx@gmail.com ````

Press continue, the pop-up still appear and the sign-in was false positive.

FF version : 156.0 (64-bit)

I'm not given the choice to STAY LOGGED IN and every time the system logs me out, I'm going through the motions of restoring my bookmarks. Isn't there a way Mozilla could fix this by allowing the bookmarks to be restored to the last login or give the user the choice to stay logged in? Better yet, DO BOTH. You know your the ONLY web browser that I've ever used that fails to do this. I'm sure their are dozens of programmers that could spend 30 minutes coding this into program. A few lines of code or a HOOK to fix this.

I stopped using Firefox on my desktop and began using Edge until it was necessary to have a Microsoft account for it to fully function. Then and only then I returned to Firefox.

Help us out here people. This is a real "rock in the shoe" issue.

Hi there, I have been using the Firefox browser for many years and had saved all my login passwords to various sites on it and I never had a problem with it. But this time, after installing Windows and the Firefox browser, when I logged into my account and turned on the sync, it did not bring any of my previous information. When I go to my account management page, it writes my membership date at the bottom of the page as of today (2026), while as I mentioned, I have had an account on the Firefox browser for many years. How is it possible that my previous information does not exist and it recognizes me as a new user and what is the solution?!

I have linux LMSDE7 Mint, Firefox will not sync. I click on the 3 top right corner lines, sign into Mozzilla, the bookmarks have not synced. Then if I go back to the same lines, it has still the "sign in" field, clicking has no reaction. It seems that mozilla is not signing in I have an other linux version, winux, there I have no problems, it syncs ok.

After reinstalling my computer system, I logged into my Firefox account again, but the data synchronization failed. All my previous data is gone, including bookmarks, passwords, and widgets. What happened? I can't find them in the mobile app either.

I am using the same account (my school email), and everything else sync successfully.

Tab groups saved on my Windows PC didn't show up on my Macbook; tab groups saved on my Macbook didn't show up on my Win PC. Is this a feature or bug?

I believe I got an automatic update to Version 154.0 yesterday on my Windows 11 laptop. When I opened Firefox after the update I got stuck

My Bookmarks appear to still be available, but my passwords are gone. The passwords are still available on my iPhone and iPad

I have tried syncing to no avail.

I need my passwords. How can I get them back?