Web
An fxaccounts:change_password WebChannel message arrived on the device that just changed its password. json_payload is the data object of that message and contains the new session token. The state machine swaps the session token for a new refresh token and re-initialises the device record.
This event is valid for the Connected and AuthIssues states. In Authenticating it is a no-op so the in-progress OAuth flow is not disrupted.