How do you block certain sites on Kindle Fire?

To block certain sites on a Kindle Fire, you can use the built-in parental controls. Go to "Settings," then "Parental Controls," and turn it on. From there, you can set restrictions on web browsing by enabling the "Web Browser" option and selecting specific sites to block or restrict access to certain categories. Additionally, consider using third-party apps designed for content filtering for more comprehensive control.