How can I load a local json file?

Question

Is there a way to configure firefox using about:config to allow local file access (for demo purposes)?

Specifically using FF12, I need to be able to

Answer 1

Ok, JSON requests using AJAX work just fine as long as your data files are down path from your originating HTML file. So I was trying to go up a level to _assets/ directory. The solution is to move _assets into the HTML current directory for access.

You can use AJAX with async=false in this case.