Samsung had to get this one right after the Note 7 but they have ended up mostly doing an Apple. There is no physical home button but rather the screen has a pressure sensitive button. For Chrome it is Settings > Advanced Settings and uncheck "offer to save passwords". Microsoft Edge is Settings > scroll down to View Advanced Settings > scroll down to Privacy Settings and set "Offer to save passwords" to off. For IE Menu > Internet Options> Content Tab> Settings button > uncheck "User names and passwords on forms".

Source: Bangkok Post April 11, 2017 23:37 UTC