What is a XPI File Type?
Some versions of Firefox allow you to install XPI files; simply drag-drop the file into an open web browser window. The Mozilla software uses a component called XPInstall (which includes the Mozilla installation script d&apos) to install the XPI packages.
If it doesn't work to drag-drop the XPI file, you can install the file in Firefox by following the instructions below.
Install an XPI file in Thunderbird with the following instructions.
Since an XPI file is compressed Zip @-@, you can manually extract the contents of the file by renaming it to l' extension .xpi to .zip and extracting the contents using a Zip compression utility, such as Corel WinZip, 7-Zip, or Apple Archive Utility. You will find most likely a .JAR file, which is usually used to contain the software to be installed, and a file install.js or install.rdf.