What are the ways to get the JSON array from an external site?

Good day!
I have the extension for chrome, which produces uploading JSON array using XMLHttpRequest
Comrades of chromium unhappy that this method is not safe (as I understand):

To have your item reinstated, please make any necessary changes to avoid requesting or executing remotely hosted code (including by referencing remote javascript files or executing code obtained by XHR requests)

The next question
Are there alternative methods to load JSON array using JS?
Because as I understand it $.JSON from JQuery works in the same XMLHttpRequest?
And what other ways I can not find
Do they exist?...