I need a porn blocker application!

Is there any possibility to avoid porn indirectly while using the internet? and if no, wouldnt it be helpful to create somehow such an application for all members of nofap? Im glad that i found this really helpful page but there is a big chance to backfire, when i use the internet generally.
so thank you a lot for your response and by the way im really motivated at the moment. Im really optimistic to success my Reboot process.