P.U.K is an acronym for a rude PopUp PopUnder Killer. P.U.K can immediately close the pop-ups displayed by livejasmin or by any other popup you specify in the Preferences dialog.
P.U.K catches links from Flash too. You can add your own filters and enable the P.U.K add-on to close specific windows.
Why would you need a rude popup killer'?
P.U.K checks the first 30 characters of the window's URL and if it contains the excluded terms it closes it immediately without further checking.
P.U.K is very simple and effective, but can cause problems if you add the wrong keyword.That is why the developer haven't included a handy menu to add websites on the fly.