.xpi file extension
- Cross-Platform Installer Module. A .xpi file is an installer module file,
used to install packages.
XPInstall (Cross-Platform Install) is a technology used by the Mozilla application Suite (Mozilla Firefox, Mozilla Thunderbird and others) for installing application extensions - allowing the functionality of the application to be extended. A .xpi file contains such an application extension.
A .xpi file is simply a zip file that contains a install script (install.js) or manifest file (install.rdf), plus other files required by the extension to be installed. The contents of a .xpi file can be viewed by renaming the file extension to .zip and then treating it as a .zip file.
.xpi files can be installed into FireFox by simply opening the file in FireFox (either clicking on a link to download a .xpi file or drag-and-drop a .xpi file into FireFox). FireFox knows that .xpi files are installer extensions and will install the extension for you.
For more information see:
Can you add to this? Do you know of any applications not already listed which will work with .xpi files, view .xpi files or open .xpi files? Are you able to contribute any additional reference information or file format information about .xpi files or have you spotted any errors or omissions? If so please let us know by emailing us at firstname.lastname@example.org - Thank you.