1) Coolly 2) Dispassionately 3) Easily 4) How browsers scan pages 5) Imperturbably 6) In a random way 7) In a relaxed way 8) In an offhand manner 9) In an unconcerned manner 10) Indifferently 11) Nonchalantly 12) Unceremoniously 13) Unflappably Found on https://www.crosswordclues.com/clue/casually