Your showing payment saves that's not address save option. Address saves doesn't require account login that is saved on the browser itself.

Precisely: the relevant help article says there should be a option to turn on save addresses in this Autofill section, but it's nowhere to be seen. That's my entire Autofill section.

I mentioned logging in to Firefox as another troubleshooting article suggested that.

You can enable the form autofill and credit card autofill feature by modifying some extensions.formautofill.*(supported|available) prefs in about:config, but no guarantee that this works properly. You can set extensions.formautofill prefs that have a value of "detect" to "on" in about:config. Close and restart Firefox after modifying these prefs, you now should find "Autofill" in "Settings -> Privacy & Security".

• extensions.formautofill.creditCards.available => "on"
• extensions.formautofill.addresses.supported => "on"
• extensions.formautofill.creditCards.supported => "on"

• https://support.mozilla.org/en-US/kb/about-config-editor-firefox

Had the same issue here. I went into "about:config" in URL Bar and searched 'autofill'. From that list i changed 2 things 1.# Find extensions.formautofill.addresses.supportedCountries and add your country code. Add a comma after the current string of countries with no spaces 2# I set dom.forms.autocomplete.formautofill from false to true

The checkbox for save and fill addresses then appeared