It is always found my webpage have been redirected to other web pages at its browser background (until I need to check the cookies so that I can be able to know where it have been redirected to at its background (hidden) after browsing websites). For example, in a simple demonstration, during the google search or going to my email account, it always goes to youtube at its background even though there has been a warning showing on the firefox page during the browse. However, the time allowed me to response is always too short, just one or 2 seconds. Even I have already clicked to stop it (not clicked "allowed" but "X"), it still was redirected.