How to get rid of double-underlined ad links
Running Win 7 Pro, FF 24.0
Recently, I've had a greater than usual number of those double underlined ad links show up while browsing. These are the links that pop up an ad if you pass over them with the cursor - damned annoying! It happens a lot lately - even in links that I go to from this forum. Also, I notice that a significant number of them are ads for Xfinity (Comcast), which is my ISP. I hardly ever use IE (running IE 8 on this machine), but I assume that they'll pop up there too.
The question is, what can I do to STOP them (either from showing up or from popping up the ads)?