Chrome is the stock browser on the S5 (at least for Verizon...I don't want to say it applies to all versions of the phone since I don't have them all, but I'd assume it applies to most if not all). Samsung doesn't have their own browser on there as they have on past devices.
Current lineup: Galaxy S5, iPhone 5S, Note 10.1 (2014), iPad Mini
Previous smartphones: Note 3, HTC One, Note 2, Galaxy S3, One X, RAZR MAXX, Galaxy Nexus, Rezound, Note, iPhone 4S, Bionic, Stratosphere, Charge, Vitality, Incredible 2, Thunderbolt, Palm Pixi Plus, Droid 3, Fascinate, Incredible, Droid Pro, Droid 2 Global, Droid X, Droid, Treo Pro, Touch Pro 2, Touch Pro, Q9m, XV6800, XV6900
Previous tablets: Note 8, Nexus 7, TF300, Evo View, Transformer Prime, TF101, Thrive, gTablet