Warn about brokeness of browser on every New Identity try
Every New Identity try could be last for user. New Identity today is about memleak, hang, alert and crash.
Need to create warning message box on every New Identity shoot, user should to understand dangerous of today code and have ability to return back without harm.
Some possible text: "Current code of browser buggy and broken by design, and code of extension can't to prevent catastrophic malfunctions. Browser can to show different alerts, hang, OOM crash, and just to crash without reasons. Are you sure want to continue?"