1. A computer-implemented method for performing visual regression testing of an application, comprising: identifying a first collection of web pages associated with a first version of the application by traversing web links from an initial web page of the first collection; capturing an image of each web page identified by traversing the web links from the initial web page of the first collection; identifying, for one or more of the web pages in the first collection, a corresponding web page in a second collection of web pages associated with a second version of the application; capturing an image of the corresponding web pages in the second collection; identifying differences in pixel values for images in the first collection and pixel values for images in the second collection to determine one or more differences between the image of at least one web page in the first collection and the image of the corresponding web page in the second collection; and generating an image providing a visualization of the one or more differences.