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I was forced to do issues with my windows to reinstall, not having the ability to backup anymore due to the errors.

So after reinstalling windows I install firefox, I log in and it doesn't sync. Searching for a solution I found one that stated, if you have a backup of your files restore those into the new firefox profile. I do that and it shows a syncing animation shortly. Nothing happens though.

I start searching for other solutions, there they state just make a new profile via about:profiles and log in. I do so and it works, it starts syncing, but the problem now is it synced what synced in that other profile. So that other profile never really synced as in it did not grab from the cloud but rather it only upped and with that I guess overwrote everything what I had there? None of my later bookmarks are there, I only have what I had as a physical backup now. Why does sync work so? Not my first fight with sync, but I never lost data like this.

Kinda wish the sync interface was user-friendlier, where I can see what is overwritten or at least that I can choose to upload or download from sync when I log in. Instead of it choosing for me to just upload...

hey team Mozilla,

i'm having a bit of an issue with Password Manager not syncing between my android mobile device and my desktop device.

on desktop, i went through hundreds of accounts. i deleted accounts. i updated password. and i changed emails associated with those accounts (this was in response to recent data breaches that led to my identity being co-opted by fraudsters).

however, none of those updates are carrying over to my Firefox android app.

to trouble shoot, i tried clearing the mobile cache, clearing the mobile data, uninstalling the mobile app, syncing my desktop app, waiting for 8 hours, syncing the desktop app again, reinstalling the mobile app, logging back in.... but for some reason, the mobile app continues to remember all of my old and out-of-date passwords.

do you have any advice?

Recently my PC has died from the hardware crash. So I've bought another PC and installed Firefox. While other browsers seem to nicely sync bookmarks and history from the previous PC, Firefox didn't do that although I have been logged into my Firefox account on both PCs and I can clearly see the other PC in devices using this account. What is the reason for that?

Hello! I have an issue where there are two entries for the same device showing up when I click "Send tab to device." I've already tried logging out on this device, and the rest of my devices, and logging back in, but there are still two entries for it. I have also verified that there is only one device under this name in accounts.firefox.com.

The following content is translated using GPT machine translation. Dear Firefox team,

I encountered a problem while using the Firefox Sync service. After registering an account with one of my email addresses, I tried to log into this account on another device, but it prompted me to register again. After following the instructions and registering, I found that both Firefox accounts are associated with the same email, but they cannot be linked together. Later, I tried using a different email address, but the same issue occurred. Finally, I attempted to log in with Google, only to discover that one of the devices does not have the option to log in with Google. I suspect this might be the reason why I cannot use Sync. The Firefox version on this device is 128.02, running on Win10.

Looking forward to your response. Wishing you a pleasant day.

So, my old computer recently broke, but I luckily recovered all my files. I was re-downloading Firefox onto this computer, but my bookmarks and add-ons and stuff won't sync. When I searched for the solution to this, I saw someone having a similar-ish problem (https://support.mozilla.org/en-US/questions/1403774#answer-1563248), but they just said they had to wait awhile for it to sync. Now, I have a couple questions that I can't seem to get the answer to:

1. How long does it take to sync my data? How long did that person have to wait?

2. What if it never syncs and that person just got lucky? Is there some sort of alternate way to fix this faster?

I'd really appreciate help on this topic, but I'm not the best with computers. If anyone has had this problem, and figured it out, please let me know! I had a lot of bookmarks and a good amount of add-ons, I really would like to not lose those.

I was using Firefox for last 5-8 years and all data was saved. Few days back i was started using Linux Debian 12. i tried to login for sync but , after logging all data was erased. I tried from windows also , no data.

Hi,

I have used Firefox for a long time. I have many bookmarks, passwords etc on Firefox on my original PC.

Sadly the hard drive on my original PC has failed. I borrowed a laptop temporarily and signed into Firefox on that. My bookmarks did not transfer across and instead I had someone elses bookmarks but I wasn't too concerned as I was only borrowing the laptop.

I now have a new PC. I have restored my files from a backup external drive and I have signed into Firefox on this PC. However, all of my tabs and bookmarks have not come across. I have pressed sync but it has brought the bookmarks over from the laptop and not the bookmarks from my original PC.

How can I sync to the original PC that has all my bookmarks etc please? Or have I lost it all forever?

Thank you.

Hello, If I create custom "Recently bookmarked" like place:folder=BOOKMARKS_MENU&folder=UNFILED_BOOKMARKS&folder=TOOLBAR&queryType=1&sort=12&excludeItemIfParentHasAnnotation=livemark%2FfeedURI&maxResults=10&excludeQueries=1 and I sync my data with other device, this bookmark gets wiped on both devices. How this can be solved? Thank you

My need to work with please help me with attached to my account and investment check with my email access to my old telegram account please help me with attached to my account and investment please

I'm sorry if this is the wrong forum, but there seems to be nothing else which seems to fit better.

I have developed an iOS App which supports Firefox Sync since about 10 years, so users of my App can directly access their firefox bookmarks. Within these years it seems that Firefox Sync has deprecated the BrowserID authentication method (which I didn't noticed because everthing worked fine) but only since recently the relevant API call "certificate/sign" is no longer working, so the authentication process will fail.

Therefore I'm looking for information how exactly I can implement the authentication now. Unfortunytely it is very hard to find reliable API documentation. Most API docs that are found seem to be heavily outdated and still list the no longer valid "certificate/sign" API call. Even the docs which already mention that Browser ID will be canceled in the future are also already outdated and half of the links lead to 404 pages.

So I would like to ask the following: Is there any definite valid up-to-date API specification for Firefox Sync and its authentication process available (suitable for third-party Apps which can not rely on Firefoxs own internal frameworks and code), and where exactly can I find it. And if a need to register an app ID/client ID and secret to be able to authenticate the App, how and where can I do this? Can anyone point me to the right direction?

Thanks for all the help...