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Cross-Platform Installer Module
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Filename extension .xpi
Internet media type application/x-xpinstall
Opens with Mozilla Firefox
Mozilla Thunderbird
ZIP
"Mozilla Firefox<br />Mozilla Thunderbird<br />ZIP" cannot be used as a page name in this wiki.
File formats category - v  e   edit

Cross-Platform Installer Module (XPI) (pronounced "zippy") is a ZIP file used to install packages, utilizing the XPInstall technology. It is commonly used to install extensions such as themes, add-ons or dictionaries.

A XPI contains installation instructions (install.js or install.rdf) as well as the actual software to install, which is often itself packaged as a JAR file. When downloaded or dropped into an extension manager, XPInstall automatically interacts with the installation instructions contained in the XPI, and installs the contained software.

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