Once bug 265467 is fixed, we can start to fix what was planned in 2011 (c.f. https://commits.webkit.org/89351@main), and start storing/serving JSON (and not JSONP) everywhere.
Pull request: https://github.com/WebKit/WebKit/pull/21011
<rdar://problem/119200588>
We can't actually do this, *because* we expect to be able to load full_results.json from file:///, adjacent to results.html, and any XHR/fetch there is considered cross-origin (and we have no way to opt-in to making full_results.json shareable with CORS). This feels unfortunate, but we don't really have any better way of doing cross-origin access without CORS than JSONP, so our function call must remain (boo).