A search plug-in provides the ability to access a search engine from a web browser, without having to go to the engine's page first. Technically, a search plug-in is a small text file that 'tells' a computer what information to send to a search engine and how the results are to be retrieved. The open-source Mycroft project provides a collection of search plugins for Mozilla-based web browsers. In this page, you can find the codes for search plugins that you can't find on mycroft website.