Where can I find the plugin for firefox - site blocking?

Question

Time Management

1. Need a fox plugin to block unwanted sites (porn).
2. You also need a list with these sites). Where can I get a bigger list, not manually collect it?
I'm currently using block site, is there something better?
3. If there is - a plugin that automatically blocks porn pictures (and spares ordinary ones)

Answer 1

1 minute in Google:
www.icensor.ru/soft/download_xpi_help.php

Answer 2

The plugin is called CensureBlock