How to kill the current running process?

Guys,

I need to kill the current running process, due to I've been running some virtual browses one after the other, but the virtual browsers runs at chrome, so, when the first virtual browser runs and finishes the test its ok, but then the second is going to run, but the process it is not still closed and the virtual browser does not open. So, could you guys help me? How can I kill the current running process?

I searched for it here in the forum, but I could not find anything that answers my question.

Here is a screenshot that could help to a better understanding:

Thank you very much!