Is cambridge.org Safe?

I have recently opened Cambridge from a different side for myself. I mean, I used it only as a dictionary to find some interesting phrases, words and collocations, but I also I found out about various research papers, international education and many other things. I believe it's cool to have such a versatile service under the belt, as you ain't know when you'll need it, but mark my words everything that you find here is useful to particular extent. Maybe I am exagerrating a bit, but it's just my vision.