Why does the Verge app do this on Android???

When I open some forum posts on the Verge app Android will kick me out to a file explorer. Sometimes hitting back repeatedly will get me back to the post but as you can see from the video that is not always the case.

In the video it opens IO File Manager because that is my default. But if I remove that as the default it will bring up a list of file explorers. It's obvious it's trying to follow an Intent, I'm just not sure why.

This post in particular is "DeadMau5 working with MS for music creating software on Windows 8" in the Microsoft Tribe forum. I should also say I'm on a GS3 running Jellybean.