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The nimbus-cli is a command line tool for interacting with the Nimbus SDK embedded in Mozilla's mobile applications.

It aims to provide a uniform way of interacting with an app, no matter what the app or the platform.


If you're looking for installation instructions, start here.


The principle goals for the nimbus-cli is to make testing and developing experiments easier:

Additionally, it is useful to be developers to investigate problems with the apps and with the internal state of the Nimbus SDK:


The tool works by using the existing tooling provided by platform vendors (for Android, adb; for iOS, simctl) to communicate with an installed app on a device, emulator or simulator.

No attempt is made to help installing or uninstalling of the apps on to devices.

There is limited support for working with iOS devices.