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Today an account called “FIREFOX-SYNC-CLIENT" was signed in under “Connected Services” and it triggered an email notifcation. Should I be worried?

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I’m very worried someone has synced all my usernames and password off my browser using this account. Should I be worried?? there are multiple failed attempts to login, in the screenshot attached.

If this account was a Firefox service then why did I get an email all of a sudden and never before? There is nothing about this FIREFOX-SYNC-CLIENT online apart from a GitHub article here: https://github.com/Mikescher/firefox-sync-client

it feels like a hacker might of used this sync method to steal my my saved Usernames and passwords. I'm worried and thought i'd ask before I change all my passwords.

I’m very worried someone has synced all my usernames and password off my browser using this account. Should I be worried?? there are multiple failed attempts to login, in the screenshot attached. If this account was a Firefox service then why did I get an email all of a sudden and never before? There is nothing about this FIREFOX-SYNC-CLIENT online apart from a GitHub article here: https://github.com/Mikescher/firefox-sync-client it feels like a hacker might of used this sync method to steal my my saved Usernames and passwords. I'm worried and thought i'd ask before I change all my passwords.
Attached screenshots

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Are you using Sync?

You can open about:sync-log via the location bar to see if recent Sync logs are available. You can upload the file to a website if you can't post the content of the file in a reply.

Helpful?

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Hi.

Thanks for taking a look. Here is the output from the 19th:

https://justpaste.it/eerz3

Helpful?

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