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At long last, Firefox has come to iOS. Rather unusually, this is the first version of the Firefox browser that does not use the Gecko layout engine, instead using iOS’s built-in WebKit-based layout engine. …..There are two big reasons that you might want to use Firefox for iOS: you’re a Firefox user on your desktop PC and want to avail yourself of synchronised bookmark and tab histories; or you buy into the idea that Mozilla is a better and safer shepherd of your Web surfing experience.