Well, it took two minutes; I uninstalled Mozilla Firefox and 'Blekko' disappeared.  I'm glad to be rid of it.  I was enjoying some of the benefits of Firefox; but I believe it was a bit 'pushy' - it seemed to push my system... quickened it up, but was it 'choosing' results for me; ... even to the point of installing Blekko.  I personally feel that a product name such as Blekko; is a spin-off of a 1960's spoof name for a bad sample product.  It really turns me of.  I'm very glad it's gone.  Conny  P.S. I can't believe I put up with it for about four days.