You did see the Note at the top of that page?

Note: The address autofill feature is currently available for en-US Firefox releases, for users located in the US.

Click on the link in that note, https://wiki.mozilla.org/Firefox/Features/Form_Autofill#Feature_Availability , for more details.

I use dutch version, so it means its correct that i dont have it,right? but...pls open my dutch link .it says the same like the english link ,no good. when comes this to me? https://support.mozilla.org/nl/kb/automatisch-uw-adres-invullen-formulieren

This is work in progress; though there are settings to enable formautofill for other countries, they are for developers and daredevil testers only. Please note that Firefox is mostly a volunteers' project, some things simply need time.