Firebase自定义域名

It was the synthetic records that was causing the issue for me. I was using CName records which, by the direction of the firebase support team is good only for subdomain redirects. Below is part of an email from the firebase support team. This is her answer to this as well as some helpful explanations.

1. Firebase uses TXT records for the verification of your custom domain.

2. On the other hand, CNAME and/or A records are used for redirection. Please take note of the following:

   • If you have a subdomain, CNAME records are recommended

   • 请注意，带有“ *”的主机名表示通配符。在您的自定义域之前键入的所有子域都会将您重定向到托管的自定义域。

   • 否则，如果您有一个没有子域的自定义域，则建议使用A记录。

   • 请注意，同时添加两个A记录将提高重定向性能
   • 另外，请删除Firebase以外的其他A记录，以防止重定向问题

就是这样 Firebase静态主机仅需要三个记录（TXT，CNAME，A）。除此之外，您将不需要实施域转发，例如您的Synthetic记录。不过，我建议您删除合成记录，并添加我在上一封电子邮件中提供的A记录。