Hi there,

You're currently posting in the English forum and we can't guarantee that a community member who speaks your language will be able to assisst you here. That said, we’ll see if someone is able to help.

In the meantime, from using a translation service, it looks like you're experiencing similar issue as this user. If that's the case, please note that our team is looking into this right now, even though we don't have any clarity about this so far.

Thanks for your patience!

The certificate for sync.firefox.com.cn expired on 5/24/2025. That's why the sync service is unavailable‌

The certificate for sync.firefox.com.cn expired on 5/24/2025. That's why the sync service is unavailable‌

Yeah, looks like that's the likely culprit of this issue. Unfortunately, I'm afraid we don't have a clear resolution path for this issue for now.

Hi there,

I was told that this problem should be solved by now. Please try again and let us know if the problem persists.