Get binary data using XMLHttpRequest in Firefox extension

Question

I am trying to download some binary data from my Firefox extension. When I try to set the generated XMLHttpRequest to arraybuffer mode:

oHTTP = new XMLHttpRequest(); oHTTP.responseType = "arraybuffer"; 

Error

 InvalidStateErr An attempt was made to use an object that is not, or is no longer, usable 

.

Is there any other way to load binary data into a Firefox extension?

Answer 1

You must first call the open method.