Allowing multiple domains for 1 Facebook App (like Tumblr)

Question

I am trying to get my website validated with the Facebook object debugger and I\'m running into the following error:

Object at URL \'http://www.exampl

Answer 1

How can a Facebook app be configured to allow being used on multiple domains?

If you try to add more than one domain in the app settings, you get an error that looks like this:

example.com must be derived from one of: Site URL, Mobile Site URL, Canvas URL, Secure Canvas URL, Page Tab URL or Secure Page Tab URL.

example.org must be derived from one of: Site URL, Mobile Site URL, Canvas URL, Secure Canvas URL, Page Tab URL or Secure Page Tab URL.

One solution is to set the "Page Tab URL" to a fake URL on example.org like so:

example.org/myfakepage

You don’t actually have to use the page tab for anything. This just allows you to add a second domain.