Mousetrapping is a technique used by some websites to keep visitors from leaving their website, either by launching an endless series of pop-up ads—known colloquially as a soggy biscuit—or by re-launching their website in a window that cannot be easily closed (sometimes this window runs like a stand-alone application, and the taskbar and the browser's menu become inaccessible). Many websites that do this also employ browser hijackers to reset the user's default homepage.
One way to end the cycle may be to use keyboard shortcuts (like Alt+F4 in Windows) instead of the mouse to close the windows. Multiple windows can be closed quickly with this method, although it may not always work if there is a resident program which is opening them. Browser extensions which disable scripting for all but a trusted whitelist of sites, such as NoScript Security Suite, can be a useful defence against mousetrapping and malicious sites.
Schemes that capture consumers and hold them at sites against their will while exposing Internet users, including children, to solicitations for gambling, psychics, lotteries, and pornography must be stopped.
- —Timothy J. Muris, Chairman of the FTC
Some major, well-known U.S. corporations have used mousetrapping to keep viewers on their web pages.
- Other definitions of mousetrapping and related practices are found at Mousetrapping and Pagejacking.
- See, for example, the FTC's complaint against John Zuccarini.
- A catalog of examples of URLs that one mousetrapper registered, which then became involved in ICANN Uniform Domain Name Dispute Resolution proceedings, is available here.
- FTC press release
- Mousetrapping 2: On to Use of Hyperlinking (These sites do not contain pornography.)