I've noticed that Firefox is continually refreshing on various pages of my site (after the "Allow Notifications" prompt is shown, but it refreshes before the user can really act on that prompt). I'm thinking it's tied to the

let refreshedPage = false;
navigator.serviceWorker.addEventListener( 'controllerchange', () => {
	if ( ! refreshedPage ) {
		refreshedPage = true;
		window.location.reload();
	}
} );

snippet added to the page by PWA.

Oddly, the homepage is pretty much the same as the other pages having the refresh issue (also having this same code snippet), but it's happily not refreshing again & again with the "Allow Notifications" prompt to be acted on.

Any idea of what might be the fix for this?