Erm? Does it speak well of Amazon when it "boldly" presents negative customer reviews on its pages? I mean, yes, I think it's useful, but I don't think that presentation of user reviews reflects particularly well OR poorly on Mozilla.
Its pretty handy for disabling javascript, changing forms from POST to GET, viewing form fields and trying different browser window sizes.
Otherwise though it does have a lot of pointless options.
To me they complement each other quite well.