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# [Android Components](../../README.md) > Samples > Browser
A simple browser app that is composed from the browser components in this repository.
⚠️ **Note**: This sample application is only a very basic browser. For a full-featured reference browser implementation see the **[reference-browser repository](https://github.com/mozilla-mobile/reference-browser)**.
## Build variants
The browser app uses a product flavor:
* **channel**: Using different release channels of GeckoView: _nightly_, _beta_, _production_. In most cases you want to use the _nightly_ flavor as this will support all of the latest functionality.
## Glean SDK support
This sample application comes with Glean SDK telemetry initialized by default, but with upload disabled (no data is being sent).
This is for creating a simpler metric testing workflow for Gecko engineers that need to add their metrics to Gecko and expose them to Mozilla mobile products.
In order to enable data upload for testing purposes, change the `Glean.setUploadEnabled(false)` to `Glean.setUploadEnabled(true)` in [`SampleApplication.kt`](src/main/java/org/mozilla/samples/browser/SampleApplication.kt).
Glean will send metrics from any Glean-enabled component used in this sample application:
- [engine-gecko-nightly](https://github.com/mozilla-mobile/android-components/blob/master/components/browser/engine-gecko-nightly/docs/metrics.md);
- [engine-gecko-beta](https://github.com/mozilla-mobile/android-components/blob/master/components/browser/engine-gecko-beta/docs/metrics.md);
- [engine-gecko](https://github.com/mozilla-mobile/android-components/blob/master/components/browser/engine-gecko/docs/metrics.md);
Data review for enabling the Glean SDK for this application can be found [here](https://bugzilla.mozilla.org/show_bug.cgi?id=1592935#c6).
## License
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this