settings Rated 3 out of 5 stars

Hi, I have a problem with Pixiv. When I try to view a bigger version of a picture (for example, http://www.pixiv.net/member_illust.php?mode=big&illust_id=######), the server redirects me to http://www.pixiv.net/member_illust.php?mode=medium&illust_id=######. That is, from big to medium size. What would be the best config so the server stops redirecting me?