On 6/4/15 5:25 PM, Ilya Grigorik wrote:
"If there is no previous document, the time origin must be equal to the time when the [attempt to obtain the resource is made][1] (step 14 of navigation algorithm)."
The initial about:blank is not loaded via the navigation algorithm at all. It's just created, as part of https://html.spec.whatwg.org/multipage/browsers.html#creating-a-new-browsing-context
In particular, the navigation algorithm is not involved, fetch is not involved. The document is just created.
-Boris