Entering fullscreen mode with F11 works as expected. Starting with command line switch `--full-screen` does make the window fullscreen, but does not hide the toolbar. Let's change that.
https://github.com/WebKit/WebKit/pull/17909
Committed 268141@main (e07345343415): <https://commits.webkit.org/268141@main> Reviewed commits have been landed. Closing PR #17909 and removing active labels.
<rdar://problem/115740444>