What Ryan said....
It's quite likely that either you have installed some extensions, or perhaps your browser has picked up some malware.
My pc has picked up so much crapware, that I'm planning on doing a complete reformat over thanksgiving. PC just pick up stuff over time.
As far as the NSA and Google are concerned. I wouldn't worry about it if I were you, unless you were under the impression that you had some degree of privacy on the internet?
There is no such thing as privacy on the internet. As long as you remember that everything you do and say on the internet is most likely recorded for all time, you'll do fine.
Programmer - An organism that turns coffee into software.
If all your friends are exactly like you, What an un-interesting life it must be.
"A door is what a dog is perpetually on the wrong side of" Ogden Nash