Mozilla is working hard to advance the security of Mozilla web applications. The goal is to detect a malicious user probing for application weaknesses and disable their ability to cause damage to the system. The value of attack aware applications is in the correct selection of detection points that minimize false positives and effectively detects malicious activity. The OWASP AppSensor research project provides numerous detection points and covers this topic in much more detail. These additional defenses are slowly being rolled into our systems and we don’t expect any impact on the bounty program in the near future.”]
Source: https://blog.mozilla.org/security/2011/02/02/attack-aware-applications/