Besides, Firefox has its own problems. The craziest is its permissive same origin policy compared to Chrome/Safari, like how `window.top.location.href = 'https

Besides, Firefox has its own problems. The craziest is its permissive same origin policy compared to Chrome/Safari, like how `window.top.location.href = 'https://example.com https://example.com';` works from inside a cross origin iframe to redirect the parent.