1. A method performed by one or more server devices, the method comprising: determining, by at least one of the one or more server devices, a first value, based on a number of occurrences that a child webpage and a container webpage are provided for presentation, the child webpage being presented within a frame of the container webpage; determining, by the at least one of the one or more server devices, a second value, based on a number of occurrences, of user interaction with the container webpage; calculating, by the at least one of the one or more server devices, a frame break score for the child webpage based on the first value and the second value; comparing, by the at least one of the one or more server devices, the frame break score to a threshold; and identifying, by the at least one of the one or more server devices and based on the comparison to the threshold, the child webpage as a webpage that breaks frames.