Safer Browser
A browser for your children with the option to ban website based on keywords.
Safer Browser is the lightweight web browser for your children and people you want to protect while surfing the Internet.
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.