- per formance ▁virtual ▁machine , ▁with ▁the ▁support ▁from ▁broad ▁Moz illa ▁community , ▁to ▁be ▁used ▁by ▁Moz illa ▁and ▁Ad obe ▁Systems ▁in ▁the ▁next ▁generation ▁of ▁their ▁JavaScript ▁and ▁Action Script ▁engines ▁with ▁the ▁ult imate ▁aim ▁to ▁un ify ▁the ▁script ing ▁languages ▁across ▁web ▁browsers ▁and ▁Ad obe ▁Flash ▁platform ▁and ▁ease ▁the ▁development ▁of ▁rich ▁better ▁performing ▁web ▁applications . ▁ ▁T amarin ▁and ▁Moz illa ▁The ▁source ▁code , ▁including ▁the ▁just - in - time ▁compiler ▁and ▁conserv ative ▁garbage ▁collect or , ▁was ▁don ated ▁to ▁the ▁Moz illa ▁Foundation ▁on ▁November ▁ 7 , ▁ 2 0 0 6 . ▁The ▁contributed ▁code ▁is ▁tri - lic ensed ▁under ▁the ▁G PL , ▁L G PL , ▁and ▁M PL ▁lic enses ▁to ▁be ▁developed ▁in ▁Moz illa ' s ▁Mercur ial ▁repository . ▁The ▁contributed ▁code ▁is ▁approximately ▁ 1 3 5 , 0 0 0 ▁lines ▁of ▁code , ▁making ▁it ▁the ▁largest ▁single ▁don ation ▁of ▁code ▁to ▁the ▁Moz illa ▁project ▁besides ▁N ets cape ▁itself . ▁ ▁There ▁were ▁plans ▁to ▁use ▁T amarin ▁as ▁part ▁of ▁Moz illa ▁ 2 ▁( and ▁therefore ▁Firefox ▁ 4 ). ▁The ▁project ▁to ▁integrate ▁T amarin ▁and ▁Spider Mon key ▁was ▁called ▁" Action Mon key ", ▁but ▁was ▁can ce led ▁in ▁ 2 0 0 8 ▁because ▁T amarin ' s ▁interpreter ▁turned ▁out ▁to ▁be ▁slower ▁than ▁Spider Mon key ' s ▁and ▁because ▁the ▁plans