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 - |
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.