I woud think it is normal that young kids love to explore and try new stuff. The problem is that they do not know what is safe or unsafe. However, I don't think stopping them to get reach of the unsafe stuff is a solution because we can never guarantee whether we can always keep a close eye on them.
I would prefer to explore the new matters with my son and tell him why I won't let him explore alone. Also, I would tell him if he wants to try anything, he should tell me first and I would arrange because it may hurt him or he cannot manage if he do it by himself.
For example, if he wants to have a look at the kitchen, I would accompany him and tell him where are the dangers and why. I would let him open the drawers to see what are inside. However, I would tell him the stove is dangerous because it may cause fire and he should not touch it.
I would repeatedly tell him crying and bad temper cannot get what he want. Speak out and I will listen. I also find that those EQ excercise books are quite useful and my son enjoys doing them with him. In fact, he treats those excercises as games.