All my browsers freeze up when I go on my wish lists...why?

I can open up Safari or Chrome, it happens on both...I go to Urban Outfitters, Forever 21, or Etsy. I log in. I go to my profile. Everything is fine up until this point. Then I click on my wish list (for ANY of those sites). The page starts to load, then freezes up. I cannot click anything on the page or scroll down the page. I can click on to another tab, but they all do it. I can click anywhere OUTSIDE the browser fine. The little spinning loading circle comes up, and the page crashes. Why does this happen? I've been browsing the web to see if it happens on any other sites, but it's only online shopping websites. Help!