Diễn đàn hỗ trợ Firefox

因工作需求，分别在五台电脑登录我的火狐账号（国内版账号），进行书签操作共享。 现在不知道因为什么问题导致，是火狐的历史书签没法多端同步（自动/手动均无效）， 其中尝试设置了 排障模式/about：config部分参数： ①contextParam--fx_desktop_v3； ②identity.fxaccounts.oauth.enabled设置为false，仍然未解决问题。 有解决方法方便直接联系3003378498@qq.com，求求大神帮帮忙，谢谢

使用系统：win11。我在之前的Firefox上已经登录了账号并开启了自动同步，前天我重新安装了系统并下载登录了账号。登录了账号之后并没有重新同步我的书签，我手动同步多次没有结果，并等待了一段时间自动同步，以及观察是否会同步书签到本地，结果仍没有。于是我尝试用我手机的Firefox登录电脑的Firefox，结果才同步了我手机的书签信息，但我手机的书签信息已经过时。而且电脑的Firefox显示可以和手机的Firefox互相同步信息及标签页等，但我观察后发现并没有完全同步，我电脑/手机的信息及标签页都是一天两天之前的，手动同步后仍然没有看到有更新。我希望同步回服务器的书签信息！

I signed into my firefox account on my wife's computer and now ALL of her bookmarks, passwords are mixed in with my data. I've signed out of both accounts on that computer. I've signed out and relogged in on my computer. This is not a temporary issue. All of her data is somehow in my account. This seems like a MAJOR security flaw of the software. Were both using Windows 11 computers.

Hello Mozilla Support Team,

I hope you can assist me with an urgent issue. After reinstalling Windows on my PC, I lost access to my Firefox Sync data, which includes years of bookmarks, saved passwords, and browsing history.

Before formatting, I had been using Firefox Sync with my Firefox Account (sometimes signed in via Google). However, after reinstalling Windows and logging back into Firefox Sync, my data no longer appears. At one point, I saw my account showing activity from just before formatting, but now that is gone as well.

I am worried that my synced data might have been overwritten or lost during this process. Unfortunately, I do not have a local backup of my Firefox profile.

Could you please help me: - Verify if my Firefox Sync data is still stored on your servers. - Assist with recovering my synced data or advise on next steps I can take. - Provide any guidance on preventing data loss in the future.

Thank you very much for your help. I look forward to your response.

Best regards.

I installed firefox on other PC and I logged in with my account. Despite having synchronization for passwords, bookmarks, etc., I can't sync my data on my new PC. Why is that?

I have multiple devices all using Firefox with the same account. On one of the devices I swapped the motherboard and since all payment methods in firefox disappeared. Syncing is active across all devices. On all other devices the payment methods are still available.

On the device with the new motherboard, I tried to disable payment methods sync and re-enable it but the payment methods list is still empty. How can I restore all the payment methods on this device? Why they are not syncing?

Thanks

I got my mother a new PC. I'm trying to sync Firefox data from the old PC to the new PC. My mother does not have a smart phone.

This isn't syncing PC to smart phone. It's syncing PC to PC. I thought just entering the username/email address and password on the new PC would do it, but it isn't.

[There are still a lot of people who don't have a smart phone and will never understand one.] [If I use my smart phone, it will sync from my data, not my mother's]

I have a desktop and a laptop on firefox. I am selling my laptop so i cleared history and deleted all bookmark history.

To my horror, even though i remember i have signed out of mozilla account on the laptop firefox, on my desktop firefox all the bookmarks including bookmark folders are gone. Thankfully, i have a fairly recent backup of firefox userprofile file so i restored them.

However, to my horror once more time, I realize now firefox sync automatically deletes my bookmarks everytime it syncs so i have to turn it off.

How can i make firefox sync to treat my current bookmarks as the latest and stop deleting them?

Sync works fine between my Android phone and my devices, in that I can see open tabs on the phone from both devices. But what does not work is sync between the laptop and desktop. They are both listed as connected devices along with the phone, both are signed in, both synch with the phone but neither will sync with the other, so I can't see the open tabs on either device. Is this an issue or is it by design? Thank you.

Hello,

How can I remove all my saved passwords from Firefox Sync? On my desktop, I went to Menu > Passwords > Three Dots > Remove all passwords, and they're gone. However, on my mobile phone, they're still there. So the sync functionality is borked. The question is, are the passwords still on Mozilla servers, or is just the sync to my mobile buggy?

Even if I were to delete my FF Sync account, for good measure I'd like to manually delete all passwords from it first though.

Any help welcome.

"This profile was previously synced to a different account To keep your data organized and secure, each Firefox profile can only be synced to one account. To sign in using xxx@xxxx.xxx, create a new profile."

So I deleted my old mozilla account since I abandoned the email that it was linked to, but when I tried to sync with my new account I get this. Is there anyway to do this without having to make a new profile?

I tried making a new profile and copy and pasting my profile into the new one, but still get the same pop up. I guess there's something in my profile that says it's been synced before, is there anyway I can find that and delete it or change it?

Dear Firefox Support,

I recently installed a fresh copy of Windows 11 and then installed the latest version of the Firefox browser. However, when I try to sign in to my Firefox account, it does not sync any of my data. My bookmarks, passwords, browsing history, and other synced items are not appearing.

I have tried clicking the "Sync Now" button, but nothing happens. I would appreciate your assistance in resolving this issue so I can recover my data.

Thank you for your support.

Best regards,

I just bought a new PC, part by part, and used my storage devices from my old PC. I formatted the windows drive and am on a fresh installation of windows 11. I tried to log in to my mozilla account, but couldn't remember my password so I used the "Forgot password" function. When I logged in, no bookmarks or history was saved. Is it possible to restore my synced data?

I had to re-installed from 0 my windows. I was sure my Firefox account had all my passwords and logins because I had problems in the past regarding this. Installed Firefox into my new fresh windows. Hit the Sync bottom. Lastly, remove the old Firefox account login from old windows (for safety).

Now I checked password, 0 passwords saved.....

I am trying to re-sync but nothing happens...

The 2-year-old support page "View synced tabs from other devices" gives 2 methods for syncing all your tabs from one Windoze FF to another. Neither one does anything at all for me now. The "right-click on the device in the sidebar" sounded SO promising, but it does not cause anything at all to happen. And checking the "sync tabs" box does indeed make them all show up in the sidebar list, but does not open anything. So besides clicking on each of the hundreds of tabs listed, how can I do this, or is it just another FF functionality lost to time?

I just created an account to sync my passwords and bookmarks from an old Macbook to a new one. I can see both devices on the Mozilla account but the Sync does not work. Nothing appears in my bookmarks.

thank you for your help.

Instructions everywhere say to open Firefox on mobile, select the options menu, and select "Sync and save your data." However, "Sync and save your data" does not exist. I cannot sync my passwords from mobile to my desktop.

Since Mozilla no longer supports Lockwise, I am trying to sync my iPhone to my laptop to get all my passwords. INstructions tell me "Sync Firefox on your phone or tablet 1. Open Firefox on your mobile device. 2. Go to the menu ( on iOS or on Android) and tap Sync and save data 3. Tap Ready to Scan and hold your phone over this code" First of all, this choice does not exist in the iPhone Firefox menu. If I go into "Settings" and press "Sync now" none of my passwords show up within Firefox. Please help. Thank you.

Hi,

I recently noticed an unknown Outlook/Microsoft account (oliveconscious13@outlook.com) saved in my Firefox logins. The email and password appear to be randomly generated, and the account’s preferred language is set to Russian. I have never seen or used this account before.

Here are the key details:

My Firefox account was created on June 8, 2025.

The unknown Microsoft account was created on July 8, 2025.

I only have two devices connected to my Firefox account: my Mac (where the account first appeared) and my Windows PC.

The account is also showing up in Chrome’s saved passwords, which I never intentionally synced with Firefox.

This is a brand-new Mac purchased directly from Apple, so I know it wasn’t a used device.

I’m trying to figure out:

How this account was added to my saved logins.

Whether this was synced from another device.

If there’s any security concern or if my account may be compromised.

Could you check my sync history or logs to see which device added this login, and advise on how to make sure my saved logins are secure?