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System: Windows 10/11 x64, Firefox 158.0

Issue: I cannot sync my bookmarks. The sync log shows that the Firefox Accounts API works fine (api.accounts.firefox.com returns 200), but the request to the Sync token server times out.

Error in log: GET https://token.services.mozilla.com/1.0/sync/1.5 failed: 2152398862 - NS_ERROR_NET_TIMEOUT TokenServerClientNetworkError Status.login: error.login.reason.network

What I need help with: Could this be caused by a firewall, proxy, or VPN blocking token.services.mozilla.com? What domains/ports should I whitelist for Firefox Sync to work properly? How can I test connectivity to the token server from Windows? Any help is appreciated.

Sync log shows that Firefox account profile login succeeds, but sync token request fails. Log snippet: Sync.Status DEBUG Status.login: error.login.reason.network => success.status_ok Sync.Status DEBUG Status.service: error.login.failed => error.login.failed

It can get cached OAuth token and request profile from profile.accounts.firefox.com successfully, but failed when requesting sync token from https://token.services.mozilla.com/1.0/sync/1.5 Browser UI shows I am logged into Mozilla account normally, but sync service cannot start.

Need help please to fix this problem: Firefox does not open QR codes on my iPhone. On my phone, the toggle for Scan QR codes is turned on. I open the camera on my phone, point it to a QR code on my laptop screen, Firefox on my phone opens in a new screen -- but nothing happens. What is missing? Thanks for helping me.

i have 4 computers and 1 Apple phone that all have Firefox installed. I used to be able to sync all of them with no problem but now it seems it has become extremely difficult and I can't seem to be able to do it as easy any more. My main computer gives me a QR code to scan on my mobile phone but the directions are not clear as to whether I should use my QR reader app or my mobile phone camera. i have not been able to sync my devices because I am having issues signing into my Firefox app on my mobile device. i am just about ready to scrap Firefox on all my devices and start using another browser as it's gotten more difficult to use Firefox. And I would like my old layout for my Windows 11 computer. i do not like the new layout.

When I scan the QR code to connect the phone to the computer to sync the bookmarks etc, the next screen asks for an authenticator code- I don't know which authenticator app I need to use for this step in the process

I have firefox on my home computer, and I finally got the school to allow me to use firefox on the school computer, but when I signed in with the same account, and turned on sync, nothing has changed. All the bookmarks and extensions and stuff is all still the same thing. I even pressed the sync now button, and still nothing happens. Am I doing this wrong? Does anyone know things I should check?

My iPad, my thankfully, my iPhone, which is a 14 Pro Max with iOS 26 and ever since I got it things haven’t worked correctly. Something always goes wrong. My iPad is an iPad Air. That will be two years old this Christmas for some reason there are no passwords in my iPad at all and then I realized yesterday there’s no bookmarks either trying to add them and my phone will crash when you open the Passwords and I have to power off the phone and reset the phone 2-4 times a day same thing with the iPad when things are getting worse as far as not responding to things I clear my history. I delete all my data and the same thing I have to go to general and shut down my iPad for a little while and then reboot it up is the only way to clear things to op around and jump around. A google bot tried to help me wanted me to skip the password. You’re locked out now and there was a code we could use instead take a picture of the code and he’s making me do it with my iPad and then I see it. It’s supposed to be a computer which I don’t have. I am stuck with just a iPad and an iPhone and I went to Reddit and people have ideas and he’s got me with everything off except the top two blue set open and I know that that’s not right I never had just those two before.

Firefox is continuously uploading or backing up then deleting it and then backing it up again over and over I am on a metered connection this is destroying me please help

You can help by letting my sync be turned on so you can see I've only one device and quit asking me to keep signing in a device already signed in . Then you might not be confused about how many devices I'm actually using

Recently I am facing this weird issue where every time I open FireFox, all my previous tabs are gone and it starts with a fresh window.

This happens even after the Account Syncing is turned ON under "Accounts And Sync" and "Open previous windows and tabs" is checked under the "Home and Startup" settings.

Hope someone can help me out as it is very frustrating to open the same tabs again and again!

Hey, I got sync bookmarks on with desktop and mobile app, but they won't sync. My mobile app's bookmarks are all old ones, how do I get rid of them and update the list? Even when deleted on desktop they're still there on mobile. I tried reinstalling (very unhappy that didn't work), and obviously reconnecting the two.

Hello, I've been using the browser on my PC for a long time and I liked it. But I went into the browser from my laptop and everything was deleted from the PC; restoring it using backup folders did not help. The question is, why should I now suffer because for some reason all my tabs have been deleted?????

Dear Sir/Madam,

Sync feature is not working at all, I signed my account on different PCs to have my history synced across all devices but it is like for nothing, every time I log my account into a new PC to have the search history of the last device nothing gets synced, I wait like for an eternity and nothing there, restart and nothing works.

Hello,

My payment info is synced across multiple devices (desktop and Android) except for one device - so I added a card manually. Now I have two of the same card across all the other devices. How do I recalibrate this so everything is in sync?

I am trying to sync my account from my Mac to my phone but it's asking for the code from my authenticator. I do not have Mozilla set up in my authenticator. How do I get the scan?

I synced the wrong Firefox profile to mY Mozilla account. I hence deleted the account to get a reset. But now I can't sync any more, because I get the message: your profile was previously synced to a different account, create a new profile. How can I activate sync again?