Out of curiosity I searched for heart rate monitors at Amazon a few days ago. Today I am on a completely independent page, investigating notepad ++, http://notepad-plus-plus.org/news/notepad-6.2.2-release.html and on the right side pops up big obtrusive Amazon ads, oddly two identical ones hawking one of those heart rate monitors and beneath them one hawking an Amazon Kindle Fire. There's a little triangle at the bottom right of the first two that says Adchoices when I hover my mouse cursor over it. How do I get rid of this stuff? What is it really? Is this produced by malware? I never used to get that stuff. I'm using Firefox 17.x.