Prevent websites from creating an infinite amount of alerts and preventing you from closing the tab.
The tweak currently checks for alerts that are created within a short period of time, and will automatically block future alerts. This will eventually change with a popup asking whether or not the alerts should be blocked, along with a settings toggle.
If you using a third party app, such as Alien Blue, I suggest closing and reopening the app because certain apps will continue to run the malicious website in the background.
No options to configure.