In this link: http://www.lectio.dk/lectio/531/SkemaNy.aspx?type=elev&elevid=4541970184 you can't open a lesson and see your homework. If there is homework for the lesson, there is a small envelope and if you click it the lesson it will unfold and you can see your homework. It is only in the mobile-version of the site that is isn't working. It is a problem on every smartphone who wants to use Firefox as browser. I think that 50% of all educations in Denmark are using this site (www.lectio.dk) for their school schedule, so it is pretty bad that it aint working with firefox, which (of cource) is my absolute favorite browser :) Hope you can fix it. Remember it is only the mobile-version of the site which is failing.