STR: 1) Visit a page with requestShipping, requestPayerPhone and requestPayerEmail (you can test with https://paymentrequest.show/demo/ ) 2) Add a shipping address with both shipping address fields and the optional telephone number (the profile shouldn't have an email at this time as it's new). 3) Use the same address in the payer/contact dropdown (identified by the phone number) 4) Edit the contact information to add your email address to the record 5) Click Update Expected result: The email address should get added to the existing address record Actual result: The address record now only consists of the email and telephone number, the address fields are blanked. The regression cause is https://hg.mozilla.org/mozilla-central/rev/95fe4f9c32033b78245886e1e83f70675624977b#l1.12 I think we can use a different approach of looking at `getFormFormat` to know which fields are applicable for the country.

Depends on D12190

Pushed by mozilla@noorenberghe.ca: https://hg.mozilla.org/integration/autoland/rev/4f693fc02c24 Always preserveOldProperties for payment request but blank mailing address fields by default. r=jaws https://hg.mozilla.org/integration/autoland/rev/5128dd79f222 Test that address fields hidden from edit forms aren't blanked unnecessarily. r=jaws

https://hg.mozilla.org/mozilla-central/rev/4f693fc02c24 https://hg.mozilla.org/mozilla-central/rev/5128dd79f222

Verified as fixed on Firefox Nightly 65.0a1 (2018-11-25) on Windows 10 x 64, Windows 7 x32, Mac OS X 10.13 and on Ubuntu 16.04 x64.