OKEx Exchange can be a really good option if you want to enter the cryptocurrency world but are confused about how to do it. It offers too many options and features which take the user experience of OKEx Exchange to the next level. Although using MetaMask is pretty simple, at times, you might need guidance on using it. In that light, I am going to elaborate on one common query raised by the users i.e. how do I open a MetaMask extension?