Ads not by this site?

[Applesaucey]

Everytime i go on facebook it says ads not by this side in the corner and its really annoying because it isnt just one little line saying it, every few seconds a new line adds to the column and after a while it becomes this huge thing. also when i click on a picture on facebook under the persons name and the date it was uploaded the same thing happens and the adds not by this site thing comes up. also, when i search something on google three links come at the top in a cream coloured box above everything else as if it was something that i searched for and its an advert for somthing which is clearly a virus. i tried deleting my cache and cookies and that didnt work then i went to add ons, disabled everything that looked suspicious and that didnt work then i disabled everything to make sure and it still didnt work. im not gonna download anything if thats what u was gonna say btw because thats how i got my self in to this situation.
dont quote me on my spelling and grammar i cba to write properly write know im frustrated at this thing. i use firefox, please send me clear instructions on how to fix this.

[Oikz]

Its prolly something you downloaded that came from a streaming video or something. Go to add ons from the "tools" tab. there is something called vid saver. Click disable. The ads will disappear once you restart firefox.

Here's a link for more info on how to remove it:

http://www.littletechiethings.com/2012/0...-site.html