When I normally open the firefox browser on my laptop the firefox account is signed in all the time and has no issue but as soon as I start sync it disconnects and when I login it shows the login success page but when I click on the "continue to navigate" the account disconnects again. Tried with temporary mode without add-ons and gave whitelisted firefox.com but it's still the same. The sync never bothered me before but I'm changing computer and I need transfer the browser data on the new computer. Can anyone help? Using Window 10, firefox version 78.0.2 (64 bit) This is the sync error report I found, the oldest report with the same issue dates july 15 2020: 1595264102440 Sync.LogManager DEBUG Flushing file log 1595264102455 FirefoxAccounts DEBUG _updateAccountData with items: ["device"] 1595264102455 FirefoxAccounts DEBUG writing plain storage: ["email","sessionToken","uid","verified","device","oauthTokens","profileCache"] 1595264102455 FirefoxAccounts TRACE starting write of json user data: ["email","sessionToken","uid","verified","device","oauthTokens","profileCache"] 1595264102456 Sync.BulkKeyBundle INFO BulkKeyBundle being created for undefined 1595264102460 FirefoxAccounts TRACE FxAccountsPush registerPushEndpoint 1595264102463 FirefoxAccounts DEBUG FxAccountsPush got subscription 1595264102464 Sync.BulkKeyBundle INFO BulkKeyBundle being created for undefined 1595264102465 FirefoxAccounts INFO registering with available commands: ["https://identity.mozilla.com/cmd/open-uri"] 1595264102465 FirefoxAccounts DEBUG updating existing device details 1595264102465 FirefoxAccounts TRACE finished write of json user data - took: 10 1595264102466 FirefoxAccounts DEBUG writing secure storage: ["kSync","kXCS","kExtSync","kExtKbHash"] 1595264102466 FirefoxAccounts TRACE starting write of user data to the login manager 1595264102475 FirefoxAccounts TRACE finished write of user data to the login manager 1595264102478 Services.Common.RESTRequest DEBUG POST request to https://api.accounts.firefox.com/v1/account/device 1595264102478 Services.Common.RESTRequest DEBUG POST Length: 877 1595264102481 Sync.LogManager DEBUG Log cleanup threshold time: 1594400102481 1595264102710 Services.Common.RESTRequest DEBUG POST https://api.accounts.firefox.com/v1/account/device 200 1595264102711 Hawk DEBUG (Response) /account/device: code: 200 - Status text: OK 1595264102711 Hawk DEBUG Clock offset vs https://api.accounts.firefox.com/v1: -1711 1595264102711 FirefoxAccounts DEBUG _updateAccountData with items: ["device"] 1595264102711 FirefoxAccounts DEBUG writing plain storage: ["email","sessionToken","uid","verified","device","oauthTokens","profileCache"] 1595264102711 FirefoxAccounts TRACE starting write of json user data: ["email","sessionToken","uid","verified","device","oauthTokens","profileCache"] 1595264102716 FirefoxAccounts TRACE finished write of json user data - took: 5 1595264102717 FirefoxAccounts DEBUG writing secure storage: ["kSync","kXCS","kExtSync","kExtKbHash"] 1595264102717 FirefoxAccounts TRACE starting write of user data to the login manager 1595264102727 FirefoxAccounts TRACE finished write of user data to the login manager 1595264102850 Sync.LogManager DEBUG Done deleting files. 1595264632518 FirefoxAccounts DEBUG FxAccountsProfileClient: Requested profile 1595264632518 FirefoxAccounts DEBUG getOAuthToken enter 1595264632519 FirefoxAccounts TRACE getCachedToken returning cached token 1595264632519 FirefoxAccounts DEBUG getOAuthToken returning a cached token 1595264632519 Services.Common.RESTRequest DEBUG GET request to https://profile.accounts.firefox.com/v1/profile 1595264633832 Services.Common.RESTRequest DEBUG GET https://profile.accounts.firefox.com/v1/profile 304 1595264702439 Sync.Service DEBUG User-Agent: Firefox/78.0.2 (Windows NT 10.0; Win64; x64) FxSync/1.80.0.20200708170202.desktop 1595264702439 Sync.Service INFO Starting sync at 2020-07-20 19:05:02 in browser session lYBlpum4-mNY 1595264702440 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score. 1595264702443 Sync.Status INFO Resetting Status. 1595264702443 Sync.Status DEBUG Status.service: error.sync.failed => success.status_ok 1595264702443 FirefoxAccounts TRACE not checking freshness of profile as it remains recent 1595264702444 Sync.BrowserIDManager INFO Getting keys 1595264702444 Sync.BrowserIDManager INFO Getting an assertion from: https://token.services.mozilla.com/1.0/sync/1.5 1595264702444 FirefoxAccounts DEBUG enter getAssertion() 1595264702444 FirefoxAccounts DEBUG getKeypairAndCertificate: already have keyPair and certificate 1595264702445 FirefoxAccounts DEBUG getAssertionFromCert 1595264702445 FirefoxAccounts DEBUG getAssertionFromCert returning signed: true 1595264702445 Sync.BrowserIDManager DEBUG Getting a token using an Assertion 1595264702445 Services.Common.TokenServerClient DEBUG Beginning BID assertion exchange: https://token.services.mozilla.com/1.0/sync/1.5 1595264702446 Services.Common.RESTRequest DEBUG GET request to https://token.services.mozilla.com/1.0/sync/1.5 1595264703113 Services.Common.RESTRequest DEBUG GET https://token.services.mozilla.com/1.0/sync/1.5 401 1595264703113 Services.Common.TokenServerClient DEBUG Got token response: 401 1595264703113 Services.Common.TokenServerClient INFO Server-reported error: {"location":"header","name":"X-Client-State","description":"Unacceptable client-state value stale value"} 1595264703113 Sync.BrowserIDManager WARN Token server returned 401, refreshing certificate and retrying token fetch 1595264703113 FirefoxAccounts DEBUG _updateAccountData with items: ["cert"] 1595264703114 FirefoxAccounts DEBUG writing plain storage: ["email","sessionToken","uid","verified","device","oauthTokens","profileCache"] 1595264703114 FirefoxAccounts TRACE starting write of json user data: ["email","sessionToken","uid","verified","device","oauthTokens","profileCache"] 1595264703114 Sync.BrowserIDManager INFO Getting an assertion from: https://token.services.mozilla.com/1.0/sync/1.5 1595264703114 FirefoxAccounts DEBUG enter getAssertion() 1595264703115 FirefoxAccounts DEBUG getCertificateSigned: true true 1595264703118 Services.Common.RESTRequest DEBUG POST request to https://api.accounts.firefox.com/v1/certificate/sign?service=sync 1595264703118 Services.Common.RESTRequest DEBUG POST Length: 888 1595264703120 FirefoxAccounts TRACE finished write of json user data - took: 6 1595264703120 FirefoxAccounts DEBUG writing secure storage: ["kSync","kXCS","kExtSync","kExtKbHash"] 1595264703120 FirefoxAccounts TRACE starting write of user data to the login manager 1595264703129 FirefoxAccounts TRACE finished write of user data to the login manager 1595264703796 Services.Common.RESTRequest DEBUG POST https://api.accounts.firefox.com/v1/certificate/sign?service=sync 200 1595264703796 Hawk DEBUG (Response) /certificate/sign?service=sync: code: 200 - Status text: OK 1595264703796 Hawk DEBUG Clock offset vs https://api.accounts.firefox.com/v1: -1796 1595264703796 FirefoxAccounts DEBUG getCertificate got a new one: true 1595264703796 FirefoxAccounts DEBUG _updateAccountData with items: ["keyPair","cert"] 1595264703797 FirefoxAccounts DEBUG writing plain storage: ["email","sessionToken","uid","verified","device","oauthTokens","profileCache"] 1595264703797 FirefoxAccounts TRACE starting write of json user data: ["email","sessionToken","uid","verified","device","oauthTokens","profileCache"] 1595264703797 FirefoxAccounts DEBUG getAssertionFromCert 1595264703798 FirefoxAccounts DEBUG getAssertionFromCert returning signed: true 1595264703798 Sync.BrowserIDManager DEBUG Getting a token using an Assertion 1595264703798 Services.Common.TokenServerClient DEBUG Beginning BID assertion exchange: https://token.services.mozilla.com/1.0/sync/1.5 1595264703798 Services.Common.RESTRequest DEBUG GET request to https://token.services.mozilla.com/1.0/sync/1.5 1595264703802 FirefoxAccounts TRACE finished write of json user data - took: 5 1595264703802 FirefoxAccounts DEBUG writing secure storage: ["kSync","kXCS","kExtSync","kExtKbHash"] 1595264703802 FirefoxAccounts TRACE starting write of user data to the login manager 1595264703809 FirefoxAccounts TRACE finished write of user data to the login manager 1595264704026 Services.Common.RESTRequest DEBUG GET https://token.services.mozilla.com/1.0/sync/1.5 401 1595264704026 Services.Common.TokenServerClient DEBUG Got token response: 401 1595264704026 Services.Common.TokenServerClient INFO Server-reported error: {"location":"header","name":"X-Client-State","description":"Unacceptable client-state value stale value"} 1595264704026 Sync.BrowserIDManager ERROR Authentication error in _fetchTokenForUser: {"details":{"now":"2020-07-20T17:05:04.026Z","message":"Authentication failed.","cause":"invalid-client-state","response_body":"{\"status\": \"invalid-client-state\", \"errors\": [{\"location\": \"header\", \"name\": \"X-Client-State\", \"description\": \"Unacceptable client-state value stale value\"}]}","response_headers":{"access-control-allow-credentials":"true","access-control-allow-headers":"DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization,X-Conditions-Accepted","access-control-allow-methods":"GET, POST, OPTIONS","access-control-max-age":"1728000","content-type":"application/json","date":"Mon, 20 Jul 2020 17:05:02 GMT","strict-transport-security":"max-age=31536000","x-content-type-options":"nosniff","x-timestamp":"1595264702","content-length":"158","connection":"keep-alive"},"response_status":401,"name":"TokenServerClientServerError"},"source":"tokenserver"} 1595264704026 Sync.Status DEBUG Status.login: success.login => error.login.reason.account 1595264704026 Sync.Status DEBUG Status.service: success.status_ok => error.login.failed 1595264704027 Sync.BrowserIDManager INFO Failed to fetch the cluster URL: {"details":{"now":"2020-07-20T17:05:04.026Z","message":"Authentication failed.","cause":"invalid-client-state","response_body":"{\"status\": \"invalid-client-state\", \"errors\": [{\"location\": \"header\", \"name\": \"X-Client-State\", \"description\": \"Unacceptable client-state value stale value\"}]}","response_headers":{"access-control-allow-credentials":"true","access-control-allow-headers":"DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization,X-Conditions-Accepted","access-control-allow-methods":"GET, POST, OPTIONS","access-control-max-age":"1728000","content-type":"application/json","date":"Mon, 20 Jul 2020 17:05:02 GMT","strict-transport-security":"max-age=31536000","x-content-type-options":"nosniff","x-timestamp":"1595264702","content-length":"158","connection":"keep-alive"},"response_status":401,"name":"TokenServerClientServerError"},"source":"tokenserver"} 1595264704027 Sync.BrowserIDManager DEBUG Cluster value = null 1595264704027 Sync.Status DEBUG Status.sync: success.sync => error.sync.reason.no_node_found 1595264704027 Sync.Status DEBUG Status.service: error.login.failed => error.sync.failed 1595264704027 Sync.Synchronizer INFO No cluster URL found. Cannot sync. 1595264704028 Sync.SyncScheduler DEBUG Next sync in 600000 ms. (why=schedule) 1595264704030 FirefoxAccounts TRACE not checking freshness of profile as it remains recent