How to keep Bitwarden online account and Firefox Extention Vaults in sync

I recently changed the password for an account in the Firefox Extension. This change does not show in my online Bitwarden account. Is there a way to sync these two or should I do it manually?

For back-up purposes I have downloaded the Online account vault and saved it as an .xlsx file but unless these two are in sync the back-up may be faulty.