We need to look at the sync logs.

Note: Do the following for each problem system/profile. And label each as to what system/profile.

Type about:sync-log<enter> in the address bar.

Open the last file created and Copy its contents Now Paste it into this forum.

If the file is too large;

Have your web browser go to; https://pastebin.com/

Paste <Control> P the content of the file in the window. Note: On the bottom, fill out the boxes as best you can.

Now press Create A New Paste. The page will reload. Copy the new web address, and post it here.

1633445648771 Sync.LogManager DEBUG Flushing file log 1633445648797 Sync.LogManager DEBUG Log cleanup threshold time: 1632581648797 1633445648822 Sync.LogManager DEBUG Done deleting files. 1633445649255 FirefoxAccounts DEBUG FxAccountsWebChannel message received: fxaccounts:fxa_status 1633445649255 FirefoxAccounts ERROR Rejected FxA webchannel message from remoteType = web 1633445654872 FirefoxAccounts DEBUG FxAccountsWebChannel message received: fxaccounts:fxa_status 1633445654872 FirefoxAccounts DEBUG fxa_status received 1633445654872 FirefoxAccounts DEBUG service: sync 1633445654872 FirefoxAccounts DEBUG is private browsing: false 1633445655307 FirefoxAccounts DEBUG FxAccountsWebChannel message received: fxaccounts:loaded 1633445655307 FirefoxAccounts WARN Unrecognized FxAccountsWebChannel command: fxaccounts:loaded 1633445663346 FirefoxAccounts DEBUG FxAccountsWebChannel message received: fxaccounts:can_link_account 1633445663347 FirefoxAccounts DEBUG FxAccountsWebChannel response: {"command":"fxaccounts:can_link_account","messageId":"16334456633382","data":{"ok":true}} 1633445679432 FirefoxAccounts DEBUG FxAccountsWebChannel message received: fxaccounts:login 1633445679432 FirefoxAccounts DEBUG Webchannel is logging a user in. 1633445679433 FirefoxAccounts DEBUG setSignedInUser - aborting any existing flows 1633445679433 Sync.Engine.Clients.Tracker DEBUG client.name preference changed 1633445679434 FirefoxAccounts DEBUG Unsubscribing from FxA push. 1633445679434 FirefoxAccounts DEBUG FxAccountsPush loading service 1633445679434 FirefoxAccounts DEBUG FxAccountsPush initialized 1633445679434 FirefoxAccounts TRACE FxAccountsPushService unsubscribe 1633445679518 FirefoxAccounts DEBUG FxAccountsPushService unsubscribed 1633445679518 FirefoxAccounts WARN Missing session token; skipping remote sign out 1633445679518 FirefoxAccounts DEBUG Destroying all OAuth tokens. 1633445679518 FirefoxAccounts DEBUG removing account data 1633445679518 FirefoxAccounts TRACE starting write of json user data: null 1633445679522 FirefoxAccounts TRACE finished write of json user data - took: 4 1633445679528 FirefoxAccounts TRACE storage set finished clearing account data 1633445679528 FirefoxAccounts DEBUG account data reset 1633445679528 FirefoxAccounts TRACE StorageManager finalizing 1633445679528 FirefoxAccounts TRACE StorageManager finalized 1633445679528 FirefoxAccounts TRACE initializing new storage manager 1633445679528 FirefoxAccounts DEBUG writing plain storage: ["email","sessionToken","uid","verified"] 1633445679528 FirefoxAccounts TRACE starting write of json user data: ["email","sessionToken","uid","verified"] 1633445679533 FirefoxAccounts TRACE finished write of json user data - took: 5 1633445679533 FirefoxAccounts DEBUG writing secure storage: ["keyFetchToken","unwrapBKey"] 1633445679533 FirefoxAccounts TRACE starting write of user data to the login manager 1633445679538 FirefoxAccounts TRACE finished write of user data to the login manager 1633445679539 FirefoxAccounts TRACE initializing of new storage manager done 1633445679539 FirefoxAccounts DEBUG startVerifiedCheck: false 1633445679539 FirefoxAccounts DEBUG whenVerified promise starts polling for verified email 1633445679539 FirefoxAccounts DEBUG entering startPollEmailStatus: start 1633445679539 FirefoxAccounts DEBUG entering pollEmailStatus: start 1633445679539 FirefoxAccounts DEBUG Notifying observers of fxaccounts:onlogin 1633445679540 Sync.SyncAuthManager DEBUG observed fxaccounts:onlogin 1633445679540 Sync.SyncAuthManager INFO Sync has been connected to a logged in user 1633445679540 FirefoxAccounts DEBUG startVerifiedCheck: false 1633445679540 FirefoxAccounts DEBUG FxAccountsProfileClient: Initialized 1633445679540 FirefoxAccounts DEBUG startVerifiedCheck: false 1633445679540 FirefoxAccounts TRACE FxAccountsPush registerPushEndpoint 1633445679541 FirefoxAccounts DEBUG FxAccountsProfileClient: Requested profile 1633445679541 FirefoxAccounts DEBUG getOAuthToken enter 1633445679541 Sync.SyncAuthManager INFO The user is not verified 1633445679541 FirefoxAccounts ERROR FxA rejecting with error UNVERIFIED_ACCOUNT, details: undefined 1633445679541 FirefoxAccounts ERROR Background refresh of initial profile failed: Error: UNVERIFIED_ACCOUNT(resource://gre/modules/FxAccounts.jsm:1529:18) JS Stack trace: _error@FxAccounts.jsm:1529:18 withSessionToken@FxAccounts.jsm:788:18 1633445679541 FirefoxAccounts ERROR Background refresh of initial profile failed: Error: UNVERIFIED_ACCOUNT(resource://gre/modules/FxAccounts.jsm:1529:18) JS Stack trace: _error@FxAccounts.jsm:1529:18 withSessionToken@FxAccounts.jsm:788:18 1633445679543 Services.Common.RESTRequest DEBUG GET request to https://api.accounts.firefox.com/v1/recovery_email/status?reason=start 1633445679615 Services.Common.RESTRequest DEBUG GET https://api.accounts.firefox.com/v1/recovery_email/status?reason=start 200 1633445679615 Hawk DEBUG (Response) /recovery_email/status?reason=start: code: 200 - Status text: OK 1633445679615 Hawk DEBUG Clock offset vs https://api.accounts.firefox.com/v1: -1615 1633445679615 FirefoxAccounts DEBUG checkEmailStatus -> {"email":"","verified":true,"sessionVerified":true,"emailVerified":true} 1633445679615 FirefoxAccounts DEBUG _updateAccountData with items: ["verified"] 1633445679616 FirefoxAccounts DEBUG writing plain storage: ["email","sessionToken","uid","verified"] 1633445679616 FirefoxAccounts TRACE starting write of json user data: ["email","sessionToken","uid","verified"] 1633445679616 FirefoxAccounts INFO the user became verified 1633445679616 FirefoxAccounts DEBUG Notifying observers of fxaccounts:onverified 1633445679622 Sync.SyncAuthManager DEBUG observed fxaccounts:onverified 1633445679622 Sync.SyncAuthManager INFO The user became verified 1633445679622 Sync.Status DEBUG Status.login: error.login.reason.network => success.login 1633445679622 Sync.Status DEBUG Status.service: error.login.failed => success.status_ok 1633445679622 Sync.Service DEBUG User-Agent: Firefox/93.0 (Windows NT 10.0; Win64; x64) FxSync/1.95.0.20210927210923.desktop 1633445679622 Sync.Service INFO Starting sync at 2021-10-05 09:54:39 in browser session fqoW01ZSG2Tv 1633445679622 Sync.Service DEBUG In sync: should login. 1633445679622 Sync.Service INFO User logged in successfully - verifying login. 1633445679622 FirefoxAccounts DEBUG FxAccountsProfileClient: Requested profile 1633445679622 FirefoxAccounts DEBUG getOAuthToken enter 1633445679623 Sync.SyncAuthManager DEBUG unlockAndVerifyAuthState already has (or can fetch) sync keys 1633445679624 FirefoxAccounts INFO fetching updated device list 1633445679624 Sync.Status DEBUG Status.login: success.login => success.status_ok 1633445679624 Sync.Status DEBUG Status.service: success.status_ok => error.login.failed 1633445679624 Sync.Service DEBUG Fetching unlocked auth state returned success.status_ok 1633445679624 Sync.SyncAuthManager INFO Getting sync key 1633445679631 FirefoxAccounts DEBUG _updateAccountData with items: ["device"] 1633445679631 Services.Common.RESTRequest DEBUG GET request to https://api.accounts.firefox.com/v1/account/devices 1633445679634 FirefoxAccounts TRACE finished write of json user data - took: 17 1633445679634 FirefoxAccounts DEBUG writing secure storage: ["keyFetchToken","unwrapBKey"] 1633445679634 FirefoxAccounts TRACE starting write of user data to the login manager 1633445679643 FirefoxAccounts TRACE finished write of user data to the login manager 1633445679644 FirefoxAccounts DEBUG writing plain storage: ["email","sessionToken","uid","verified","device"] 1633445679644 FirefoxAccounts TRACE starting write of json user data: ["email","sessionToken","uid","verified","device"] 1633445679645 Services.Common.RESTRequest DEBUG POST request to https://api.accounts.firefox.com/v1/oauth/token 1633445679645 Services.Common.RESTRequest DEBUG POST Length: 81 1633445679645 Services.Common.RESTRequest DEBUG POST request to https://api.accounts.firefox.com/v1/account/scoped-key-data 1633445679645 Services.Common.RESTRequest DEBUG POST Length: 84 1633445679649 FirefoxAccounts DEBUG FxAccountsPush got subscription 1633445679651 Sync.Engine.Clients.Tracker DEBUG client.name preference changed 1633445679658 FirefoxAccounts TRACE finished write of json user data - took: 14 1633445679658 FirefoxAccounts DEBUG writing secure storage: ["keyFetchToken","unwrapBKey"] 1633445679658 FirefoxAccounts TRACE starting write of user data to the login manager 1633445679668 FirefoxAccounts TRACE finished write of user data to the login manager 1633445679715 Services.Common.RESTRequest DEBUG GET https://api.accounts.firefox.com/v1/account/devices 200 1633445679716 Hawk DEBUG (Response) /account/devices: code: 200 - Status text: OK 1633445679716 Hawk DEBUG Clock offset vs https://api.accounts.firefox.com/v1: -1716 1633445679716 FirefoxAccounts INFO Got new device list: 1633445679716 FirefoxAccounts INFO updating the cache 1633445679871 Services.Common.RESTRequest DEBUG POST https://api.accounts.firefox.com/v1/oauth/token 200 1633445679871 Hawk DEBUG (Response) /oauth/token: code: 200 - Status text: OK 1633445679871 Hawk DEBUG Clock offset vs https://api.accounts.firefox.com/v1: -1871 1633445679871 FirefoxAccounts DEBUG _updateAccountData with items: ["oauthTokens"] 1633445679871 FirefoxAccounts DEBUG writing plain storage: ["email","sessionToken","uid","verified","device","oauthTokens"] 1633445679871 FirefoxAccounts TRACE starting write of json user data: ["email","sessionToken","uid","verified","device","oauthTokens"] 1633445679872 Services.Common.RESTRequest DEBUG GET request to https://profile.accounts.firefox.com/v1/profile

I see errors in the report and called for more help.

any update on this? or can i download my stuff synced online and make firefox import locally?

And you synced both off your Computers to the Cloud ?

I synced first computer, then singed into new computer the old computer is gone. Now I don’t have the data firefox didn’t sync my stuff to new computer.