What is Islam's view on freedom of speech and freedom of opinion?

Knowing the wisdom behind human existence, which is the worship of God alone and submission to His commands, is the foundation that governs one's words, actions, and opinions, unlike the proponents of decadence and dissolution. Words are dangerous in Islam, for every utterance is recorded and can either lead to Paradise or cast one into Hell. Therefore, one must either speak good or remain silent. Freedom of speech is not absolute, even according to its proponents; rather, it is restricted by law, custom, public taste, and the freedom of others. Islam does not prohibit expressing opinions on political, economic, and social issues or criticizing mistakes, but this is subject to the conditions and etiquette of Islamic law. As for claims of freedom of speech that aim to transgress against religion and its law, such as advocating immorality or slandering the Quran and Sunnah (definition), it is incumbent upon rulers to prevent them in order to protect religion. Muslims do not have what is called "absolute freedom of opinion," but rather submission to God's rule. Whoever speaks the truth is supported, and whoever speaks falsehood is prevented.