You can enable the form autofill and credit card autofill feature by modifying some extensions.formautofill 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. extensions.formautofill.creditCards.available => "on" extensions.formautofill.addresses.supported => "on" extensions.formautofill.creditCards.supported => "on"

You can add your country code to the supportedCountries prefs. extensions.formautofill.creditCards.supportedCountries extensions.formautofill.addresses.supportedCountries

thank you, but unfortunately, it doesn't work, countries still default to US and CA. If it was so easy, why Firefox would not add entire list? seems like it don't care about users worldwide

If you set the extensions.formautofill prefs to 'on' and close and restart Firefox then you should see the Autofill section in "Settings -> Privacy & Security". Adding your country code to the supportedCountries prefs is an alternative for the former.

Sorry, i guess i didn't assume it will work this way. Looks ok now, still didn't explain why developer cannot fix this.

I will test if it works in real form, but address is now available in Settings

thank you