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Had to change primary email to regain access (can't remember if I had to add or just swap primary and secondary) So I was able to restore bookmarks from a cloud copy backup. But now I can't login using the old primary email profile to sync passwords. Logging in says 'Must use primary email' but it doesn't have any passwords

Should I back up locally then swap primary email or is there another way?

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.

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