Why is your Mac all for sudden using Bing as a search engine?

A tip from our friends at the Internet Storm Center

[weeks]

...Sure enough, there is a FREE! Internet Explorer for Mac available. Let's download it, and see what happens.

Nooooooo! Bad, bad idea.

In the end, you end up with a bunch of adware, and , an actual legit version of Internet Explorer 5, which used to run on Mac OS, but doesn't really run on OS X Mavericks.

[isc.sans.edu...]

No one here would do this, but you likely have a friend with a Mac who is, well, you know....

[not2easy]

Headline made me curious, since Bing is one of the options I have for search in FireFox, I just find it isn't very much used. No, that sounds horrible.