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File type: XPI

What is .XPI?

Files with the extension .XPI are associated with Mozilla application extensions. These files are ZIP files that are designed to install an extension into a Mozilla application such as Firefox or Thunderbird.

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How can I open .XPI files?

If you have an .XPI file, and you know what extension it is designed to install, you can simply drag and drop the file onto an open Firefox browser window. The extension will be installed after you restart your browser.


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XPI

From Wikipedia, the free encyclopedia

XPInstall (Cross-Platform Install) is 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.

An XPI (pronounced "zippy" and derived from XPInstall) installer module is a ZIP file that contains an install script or a manifest at the root of the file, and a number of data files.

In Mozilla, Firefox < 0.7, and Thunderbird < 0.5, the package contained a JavaScript install script (install.js) with some directives for actions to take during an install, including adding files and directories, removing old or obsolete files and directories, executing command line tools, etc. In more recent Firefox and Thunderbird versions, the install script has been replaced by a chrome manifest and a RDF file (install.rdf).






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