Mac MiniBrowser attempts to download a javascript URL when navigating to a new top level browsing context. In other words, when attempting to open a popup to a Javascript URL (e.g. with a target=_blank anchor element) MiniBrowser tries to download the resulting javascript execution as a plain text file. Mac MiniBrowser should match Safari's behavior of cancelling the navigation.
<rdar://problem/101502667>
Pull request: https://github.com/WebKit/WebKit/pull/5709
Committed 255918@main (61e2b7c76840): <https://commits.webkit.org/255918@main> Reviewed commits have been landed. Closing PR #5709 and removing active labels.