Packages and apps

XPI viewer

To open an XPI file, drop it in the box below. It opens straight away, even with no extension or the wrong one. Your browser opens it on your device: nothing is uploaded.

Opened on this device, never uploadedDrop or paste another file at any time

What you see

XPI in the viewer
Manifestmanifest.json, with names from _locales
PermissionsListed
SafetyRead from its headers only: nothing in it is run
Extensions.xpi
UploadNone: opened on your device

What is an XPI file?

In short

An XPI is a Firefox add-on: a ZIP with the extension’s code and its manifest.json.

The add-on’s name, version, ID and permissions from manifest.json, then every file.

How to open an XPI file

  1. Add your XPI. Drop the file in the box, choose it or paste it.
  2. Look at it. The add-on’s name, version, ID and permissions from manifest.json, then every file.
  3. Take it further. Download any file from inside an archive, or open another file.

Questions

Drop it here: they are listed from its manifest.

No. The package is only read: its manifest and its list of files. Nothing in it runs, and nothing is uploaded.

No. The viewer runs in your browser and opens the file on your device. Nothing is sent anywhere.

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