As a JIRA System Administrator, I can instruct web browsers to not allow saving a user's password in the various login options, so that unauthorized users can not access the system.
In some organisations, as part of a set of security requirements, it is required for compliant applications, to disallow users to store there application password in their browser. It would be perfect, if JIRA and all other Atlassian applications would allow to configure the autocomplete="off"...