Web Broom

This extension masks all the swearwords on a page. If it doesn't know the word, you can add it to its database.

Like a water filter purifies the water that you drink, Web Broom purifies the web pages that you read.

And you can actually have fun with it. Just try to mask ordinary words, for instance "California" => "Sunny Place" or "Schwarzenegger" => "Terminator" and you will see how news titles turns from smth like this:

"Schwarzenegger becomes California governor"

to smth like this:

"Terminator becomes Sunny Place governor"