The _WKWebExtensionContext will be the object that manages the runtime environment for a _WKWebExtension.
Pull request: https://github.com/WebKit/WebKit/pull/5177
Committed 255374@main (476ad6dbea8e): <https://commits.webkit.org/255374@main> Reviewed commits have been landed. Closing PR #5177 and removing active labels.
<rdar://problem/101012136>