[jQuery] How to disable jQuery favicon?

I have a page where I've used jQuery. I have not designated a favicon on the page, but for some reason there is a jQuery logo as the favicon. How do I disable this?

[jQuery] jQuery.ajax() not calling beforeSend?

I need to set some headers (I wish this were doable by just passing in a map), but it seems that beforeSend is never being called. Needless to say that's a bit of a problem for me. The alert below never occurs (and a breakpoint is never hit if I put it there), but I can see that the ajax request