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Mozilla's Chief Executive Officer Gary Kovacs gives a press... News PhotoBarcelona - Spain,CEO,Day,Giving,Mobile World Congress,Mozilla,Mozilla Firefox,New,Order,Press Conference,Science and Technology,Spain,Technology,VerticalPhotographer Collection: AFP 2013 AFPMozilla's Chief Executive Officer (CEO) Gary Kovacs gives a press conference to present the new Firefox OS mobile operating system in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / JOSEP LAGO (Photo credit should read JOSEP LAGO/AFP/Getty Images)