ANSWER:

This is not a vow or oath therefore, no expiation is needed. However, he is sinful for going back to watching such filth that can block him from saying the shahadah on his dying bed, may Allah protect us

QUESTION: If someone committed zina and later told Allah that he would block pornographic websites, hoping this would increase his chances of forgiveness. Later, he changed his mind and did not do so. Would any kaffarah be required? He did not intend to make a vow (nadhr), pledge, or binding promise; he only said this while speaking to Allah.