1. A method comprising: receiving, from a user device of a user, parameters indicating different browser/operating system combinations for a visual comparison of screenshots of a state for the different browser/operating system combinations; based on the different browser/operating system combinations indicated by the parameters, retrieving the screenshots along with corresponding metadata for each indicated browser/operating system combination; and causing, using a processor of a machine, a user interface that visually compares at least two retrieved screenshots to be provided to the user device, the user interface including a display of the corresponding metadata for the at least two retrieved screenshots.