The French privacy authority CNIL on Thursday fined Google and Facebook 150 million and 60 million euros respectively.
Cookies are small files that can be stored on the device. They come in different forms. Some are needed to run a website, for example to keep the visitor logged in. Others are used to track visitors online.
CNIL has found that the websites of Facebook, Google and YouTube do have a button to accept cookies immediately, but there is no button to refuse them just as easily.