Do browsers preserve order of inputs with same name on GET/POST?

I have this HTML code with multiple inputs with the same name:

<input type="hidden" value="42" name="authors" />
<input type="hidden" value="13" name="authors" />
<input type="hidden" value="33" name="authors" />

The order of the values is important. Does the HTML spec define that user agents have to preserve this order, and if yes, do the common (market share > 1%) browsers follow this definition?

Bonus points if someone knows if WSGI and especially Django preserve the order server-side :-)

Thanks!