Chrome popup on random urls? I have a NAS on a local IP address, 192.168.x.x.
When I open Chrome and go to that address, I'm seeing a suppressed popup. If I permit the popup, it goes to Uniregistry (a Go-daddy co). FWIW, this doesn't happen in Firefox. Trying to understand why this occurs.
I am running Yosemite 10.10.5 on a 2010 MacPro.
Update - I was going down the wrong path. This is unrelated to the NAS/local IP issue.

The same redirect was blocked when visiting a math blog.
Aside from confirming that Chrome is set to block redirects, I'm still trying to understand their source.
Using a bit of the scientific method, narrowing down the cause of the popup.
Other browsers didn't have the same issue, only Chrome. And the popup was occuring on my own NAS, with no other users reporting such an infection.
So, back to Chrome. I looked at my extensions. Over 2 dozen. Turned them all off, and the popups stopped. Turned them on, 4 at a time, until I found the one that caused this. When I clicked to look in the Chrome store, it's no longer listed. Mystery solved.
(Thank you, Allan, for the time and patience, and the SW reference, which helped me find unwelcome adware.)