I have three devices using Firefox, all synced under 1 FF account. Three of these devices are working well and continue to sync without issue. My desktop is the fourth device, and it was working until I formatted it and started from scratch. Upon my fresh install of FF 70 on Win 10 1903, I recieve "unexpected error" after only entering my email address in and trying to proceed. This generates an error in the console: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.accounts.firefox.com/v1/account/status. (Reason: CORS request did not succeed). I have uninstalled and reinstalled FF, cleared my windows profile appdata folder, C:/programdata folder, all registry entries citing mozilla or firefox, and nothing seems to be able to fix this. Any advice? Thank you!