Strange ads appear in Chrome

That add is there because whatever website you are on has placed it there. It is not on the US version of that page using any browser.

Yeah sorry I didn't read your full post.

Mackeeper is SPYWARE, JUNKWARE, Mac KILLER.

You are right something you installed F'ed up your system.

It's possible, though unlikely at this time, that this is malware. There have been some malware programs that add advertisements to pages, though, so it would be wise to do a scan, unlikely or not. Use either ClamXav or Sophos.

Also, you mention Chrome specifically, but didn't say whether you see the same behavior in other browsers? Do you? If it's only in Chrome, it may be some kind of Chrome extension or plug-in or toolbar that you have installed. (I don't use Chrome, so I don't know what the options are there.)

Another possibility is that the network itself is inserting them. Does it happen on all networks, or just certain networks? Some networks, including some ISPs, have been known to insert advertisements into web pages.

Of course, since you installed MacKeeper - perhaps the most infamous amongst all Mac crapware - it's entirely possible you have installed some other crapware that is doing it. (Not meaning that to be insulting, if it sounds that way... I'm just trying to point out another possible cause, and tell you to be more careful what you install in the future.)

Flaxion wrote:

It's not ISP specific.

How can you say that? Do you have more than one ISP hooked up to your network.

All of the type of ad you show above, that I'm familiar with, have end up being inserted by one's ISP, either directly or through their DNS service. I would start by giving them a call to assure yourself it's not coming from them.

Flaxion wrote:

It was the extension Fast Save for Chrome that made these ads. The solution was to uninstall the extension.

Thanks for getting back to us. Good to know.