How to Use XPI

An XPI file is an extension or add-on for the Mozilla Firefox browser. Firefox was one of the first browser's to allow users to customize their browsing experience by creating and installing a myriad of add-ons, greatly expanding the application's usability. Installing XPI files is extremely simple and straightforward, provided you have the Mozilla Firefox application on your computer. If not, you will need to download it--it is a free application.

Things You'll Need

• Mozilla Firefox

Instructions

1. Download and install the Mozilla Firefox application, if you have not done so already (see Resources).

2. Launch the browser. It will be located in the "Programs" menu (Windows) or "Applications" folder (Mac OS X) after installing.

3. Select "File > Open" from Firefox's menu bar. Browse for the XPI file on your hard drive. Click "Open" after selecting the file.

4. Click "Install Now" after Firefox processes the file and recognizes it as an extension. It will take a second for Firefox to process the file, during which the "Install Now" button will be deactivated, displaying a countdown from three.

5. Quit Firefox and and reopen it to complete the installation of the extension.

References

• Access Firefox: Manually Install Add-on