A method, comprising: at an electronic device with a touch-sensitive surface and a display, wherein the device includes one or more sensors to detect intensity of contacts with the touch-sensitive surface: displaying a back button on the display, detecting a contact on the touch-sensitive surface while a focus selector corresponding to the contact is at a respective location on the display that corresponds to the location of the back button, wherein the back button is associated with additional information that is not initially displayed on the display, which additional information includes a browsing history that includes a list of representations of previously accessed information; and while the focus selector is at the respective location: in accordance with a determination that the contact has an intensity above a respective intensity threshold before a predefined delay time has elapsed with the focus selector at the respective location, displaying the additional information associated with the respective location without waiting until the predefined delay time has elapsed; and in accordance with a determination that the contact has an intensity below the respective intensity threshold, waiting until the predefined delay time has elapsed while the focus selector is at the respective location to display the additional information associated with the respective location. at an electronic device with a touch-sensitive surface and a display, wherein the device includes one or more sensors to detect intensity of contacts with the touch-sensitive surface: displaying a back button on the display, detecting a contact on the touch-sensitive surface while a focus selector corresponding to the contact is at a respective location on the display that corresponds to the location of the back button, wherein the back button is associated with additional information that is not initially displayed on the display, which additional information includes a browsing history that includes a list of representations of previously accessed information; and while the focus selector is at the respective location: in accordance with a determination that the contact has an intensity above a respective intensity threshold before a predefined delay time has elapsed with the focus selector at the respective location, displaying the additional information associated with the respective location without waiting until the predefined delay time has elapsed; and in accordance with a determination that the contact has an intensity below the respective intensity threshold, waiting until the predefined delay time has elapsed while the focus selector is at the respective location to display the additional information associated with the respective location. displaying a back button on the display, detecting a contact on the touch-sensitive surface while a focus selector corresponding to the contact is at a respective location on the display that corresponds to the location of the back button, wherein the back button is associated with additional information that is not initially displayed on the display, which additional information includes a browsing history that includes a list of representations of previously accessed information; and while the focus selector is at the respective location: in accordance with a determination that the contact has an intensity above a respective intensity threshold before a predefined delay time has elapsed with the focus selector at the respective location, displaying the additional information associated with the respective location without waiting until the predefined delay time has elapsed; and in accordance with a determination that the contact has an intensity below the respective intensity threshold, waiting until the predefined delay time has elapsed while the focus selector is at the respective location to display the additional information associated with the respective location. in accordance with a determination that the contact has an intensity above a respective intensity threshold before a predefined delay time has elapsed with the focus selector at the respective location, displaying the additional information associated with the respective location without waiting until the predefined delay time has elapsed; and in accordance with a determination that the contact has an intensity below the respective intensity threshold, waiting until the predefined delay time has elapsed while the focus selector is at the respective location to display the additional information associated with the respective location.