How to show a tab standalone?

Configuration Frontend
1

I use Home Assistant and slowly working my way through the Lovelace UI. It looks so good that I am considering replacing my home made dashboard with it (and its cards).

My dashboard is read-only and displayed on a standard screen (no touchscreen). In order to use Lovelace, I would need to show the content of a specific tab standalone (in a full-screen browser). I would like to remove all other tabs and the surrounding chrome (the menu, the notifications, …)

Is this possible?

UPDATE: when looking at the code of the page, the solution could be to somehow remove or collapse <app-header>, similar to the quick snippet below (loaded via an extra HTML document) which does not work yet (the element cannot be found for some reason):

<script>
    window.addEventListener("load", function () {
        if (window.location.search.indexOf('fullscreen=yes') > -1) {
            console.log('fullscreen, removing header')
            setTimeout(function () {
                const header = document.getElementsByTagName("app-header")[0]
                header.parentNode.removeChild(header)
            }, 2000)
        } else {
            console.log('not fullscreen')
        }
    })
</script>