This extension makes a lot of extensions look like kids games, and it is free. sure it needs you to understand how computers work to be able to operate it, well that is why you are here in the first place, because you think you are the top notch programmer who have useful stuff to share with the community and would like to use some great and almost complete functions that other programmers/developers has been so kind as to share with you so that you don't have to invent the wheel all over again.
This extension beats them all.
I am just saying. be happy when the functionalities are free and share some useful stuff with us.