I understand the spirit of this extension. I admire it actually. But truthfully, it's a waste. Because "stupid f***ing boss" doesnt sound any nicer or less offensive. The true solution is to strip yourself of this victim mentality you've been lulled into and don't let petty words bother you so bad. They're just words. In one ear and out the other. Edit: Hold up, this addon is from Mozilla? You can't be serious. Not you guys too!

Would be good if it let you set what words are blacklisted.

It does what it says, but isn't there more important things that Mozilla can do to help prevent online harassment and just make the internet a better place overall than just replacing words?