How to Block Website In Firefox

Most of the parents love to keep their children safe from the bad side of the internet and as we all know that adults sites contain a lot of things that all the parents don't want their children to see and  for that i try to look for a way to block adults sites and let you have a very safe internet surfing for your children , so let's start :
In this tutorial i'll talk about how to block sites on Firefox :

Firefox website : https://www.mozilla.org
so first open firefox and follow my steps .
 1)_
2)_ 


3) write " blocksite" in the search box above :


4)_ install the extension and restart the firefox :



5)_ in this window you can add the sites that you want to block :


and finaly i would like to ask you to share this article so other people can protect their children from adult websites .