Did Dropbox stopped working as a Unity Web Player?

I read some tutorials here, seems that I'm doing everything right, but It's not working. Here's what I did: 1. Exported my game as a web player | 2. Put it on dropbox in a public folder | 3. Copied the link of the HTML file

But when I put the link on browser (tested on Chrome and Safari), the player doesn't starts. It just gives me the option to download the HTML file fo my game. Can someone help me, please? Thanks!