XPInstall
| XPInstall (XPI) | |
|---|---|
| Filename extension |
.xpi |
| Internet media type |
application/x-xpinstall |
| Developed by | Mozilla Foundation |
XPInstall (Cross-Platform Install) was a technology used by the Mozilla Application Suite, SeaMonkey, Mozilla Firefox, Mozilla Thunderbird and other XUL-based applications for installing Mozilla extensions that add functionality to the main application. Support for XPInstall was removed from Firefox in November 2017 with the release of Firefox 57.