I'm having issues setting dynamic links with a custom domain. My domain is from Google Domains, and it's linked to a Squarespace site. When I try to add the A records to my domain on Google Domains ... it says the records already exist. And I can't figure out how to override or remove them. Or if that will mess up my linkage to Squarespace. Thanks!
Few of things I was missing, with great help from the Firebase slack channel:
First, You can't use the same domain as your Squarespace domain. You'll need to create a subdomain. I used link.???.com
Second, when I changed the DNS settings, Firebase instructions ask you to add two A records. But the second always fails saying it already exists. Support folks said you only need one, the second is for redundancy. Instructions should state this!
Next, I was missing steps 1 and 3 in these instructions. For step 3, make sure you create the property as an array.