[aidenn0]

Thanks for the reply!

My question was more of a "WTF is Firefox doing in the ~700ms between when the HTML has finished a network transfer and before the .css file is requested?"

I just tried it today and things are, in general, much faster (presumably due to the reduced load), but there is still over 500ms between when the .html completes the download and the .css is queued for transfer.

[edit]

I just tried it in a private window and most of the delay disappears, so I suspect extensions.