Add the class mzp-l-wordmark-center-on-sm-md
for a centered wordmark only in small to medium viewports, changing to the standard alignment (with the text direction) in larger viewports.
<div class="mzp-c-wordmark mzp-t-wordmark-lg mzp-t-product-firefox mzp-l-wordmark-center-on-sm-md">Firefox Browser</div>