how to block adults site

Have you seen the links to the right I need to block access to all adult and porn sites on firefox searches https://support.mozilla.org/en-US/questions/1399490 i have 3 young kids, how do i block sites that arent family friendly https://support.mozilla.org/en-US/questions/890340 Do they help?

Hello For other information Can i block websites? https://support.mozilla.org/en-US/questions/1585489 For information https://connect.mozilla.org/t5/discussions/enterprise-policy-generator-an-open-source-browser-based/td-p/127768