WebExplor discovered 3,466 failures. After manual inspection, we find that 83.71% failures come from the original web applications, while the rest are from third-party libraries. (right figure)

This indicates that most failures indeed exist in the orginal web applications, resulting in an urgent need of end-to-end testing such as WebExplor.

WebExplor leverages no manually-tuned parameters, demonstrating high scalability among various modern web applications. (See detial failures here)