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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
ZIPProperty "Program" (as page type) with input value "Mozilla FirefoxMozilla ThunderbirdZIP" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.
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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