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Trigger scripts are typically invoked by JavaScript event handlers on hyperlinks. When a user clicks the link "Install the New Blue theme" in the example below, XPInstall downloads, registers, and installs the theme contained in newblue.xpi to the user's profile directory.

<a href="#"
Install the New Blue theme</a>

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 Contributors to this page: Sheppy, trevorh, Domingos Savio Salvador, Fredchat, Rod Whiteley
 Last updated by: Sheppy,