Manipulate the DOM before any resources have loaded using Capturing

Sadly it's not a native API, but a clever hack that effectively comments-out source of the page with a legacy `&#60;plaintext&#62;` element (proving that old cruft is <i>really</i> hard to kill in HTML :)

Adding a blocking javascript resource that disables speculative resources loading is going to speed up pageloads?

I didnt know this was a thing, wouldnt this be a really nice place to be doing l10n?

or you know, you can use some inline scripts, brand new lib coming out next week i guess.