Safer Browser is the lightweight web browser for your children and people you want to protect while surfing the Internet.
The application allows you to specify potentially dangerous keywords (a set of keywords ships by default). Its artificial intelligence will then be able to ban those websites which have to do with the specified keywords.
With Safer Browser, if you are going to ban the word "adult", then the user, presumably your children, won't be able to browse any website containing the the word "adult" in their text and even in their metadata!
You can manage the words blacklist easily with a protection of a password.