On the homepage, "Personas are lightweight, easy to install and easy to change “skins” for your Firefox web browser." should read: 'Personas are lightweight, easy-to-install and easy-to-change "skins" for your Firefox web browser." (Those two phrases are compound modifiers of "skins.")
Waiting on ok from Suneel or Rolo.
OK with this change for now (as S- Donner seems to have an excellent grasp of proper grammar), but cc'ing J-Slater on this bug for his thoughts. Please proceed unless J-Slater has a different opinion.
updated, should show up in about 10 mins.
Verified FIXED on https://sm-weave-proxy01.services.mozilla.com/store/.