Correct behavior is debated and decided in public, resulting in a specification. In this case the HTML spec says "should", not "must". HTML Spec: > When an ele

Correct behavior is debated and decided in public, resulting in a specification. In this case the HTML spec says "should", not "must". HTML Spec: > When an element's autofill field name is "off", the user agent should not remember the control's data, and should not offer past values to the user. RFC2119: > SHOULD: This word, or the adjective "RECOMMENDED", mean that there may exist valid reasons in particular circumstances to ignore a particular item, but the full implications must be understood and carefully weighed before choosing a different course. As I read it, this behavior may or may not be a good idea, but it is not a violation of the standard. Disclosure: I used to work on the Chrome team at Google, but I have no particular knowledge of autocomplete.