alt Hacker News> I think they're moving in the WebKit/Safari direction: open for you to look at, but not really an open source project.
Webkit absolutely takes third party submissions. https://webkit.org/contributing-code/ .
I believe this is an external PR merged a few hours ago at the time of this writing. https://github.com/WebKit/WebKit/pull/66507
Safari does not accept third party submissions, but the chrome has never been open (even before Google Chrome recycled the term).
WebKit does allow outside contributions, though that example is perhaps not the most illustrative as it is from an Igalia employee. Igalia maintains substantial parts of WebKit and at this point has to be the #2 contributor other than Apple themselves.