Keep her away from eating chalov stam and wearing denim skirts!
On a serious note, if you try to lock it down with filters and other restrictions, she (or her friends) will find a way around them if they really want. It’s actually an easy task to accomplish.
Perhaps, have your wife have an honest conversation with her (in private) about the dangers of the Internet, nasty people that take advantage of innocence, etc. The more you restrict some things, the possibility of your child rebelling can increase.
I think it’s best to be open with children regarding some things to a certain extent, and let them know if they ever need to talk then your heart and ears are open to listen to them.