Only on Firefox “Loading failed for the [removed] with source”

Question

I want to integrate Marketo form with my existing website on yii framework. My code works on all the browsers except Firefox.

Excerpt from my code:

Answer 1

I ran into the same issue (exact error message) and after digging for a couple of hours, I found that the content header needs to be set to application/javascript instead of the application/json that I had. After changing that, it now works.