Excellent at hiding porn Rated 5 out of 5 stars

I critiqued this add-on by attempting to find porn using popular explicit keywords common to adult sites. All entries returned "No results".

Terms that are generally sexual—but not always—still get filtered. Searching for "breast" gave me, in the top ten, results for "breast cancer", "chicken breast", and "breast (anatomy)" at WebMD.

This looks like a pretty good alternative to Google for children, if you're concerned they might stumble on shady sites. Five stars.