# Application

The **Application panel** provides tools for inspecting and debugging modern web apps (also known as [Progressive Web Apps](https://developer.mozilla.org/en-US/docs/Glossary/Progressive_web_apps)). This includes inspection of [service workers](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) and [web app manifests](https://developer.mozilla.org/en-US/docs/Web/Manifest).

```{image} sw-registered.jpg
:alt: the firefox application panel zoomed out view showing a picture of two arctic
:  foxes
:class: border
```

## Accessing the Application panel

The Application panel is available on the standard DevTools tab menu under *Application*. If you can’t see it there, you can enable it by going to the "three dot" menu and selecting *Settings* (also accessible by pressing F1), then checking the *Application* checkbox under *Default Developer Tools*.

## Finding an example

If you want to test this functionality and you don't have a handy PWA available, you can grab one of our simple examples to use:

- Add to homescreen demo: Shows pictures of foxes ([source code](https://github.com/mdn/pwa-examples/tree/master/a2hs) | [live version](https://mdn.github.io/pwa-examples/a2hs/))
- Js13kpwa demo: Show information on entries to the JS13K annual competition ([source code](https://github.com/mdn/pwa-examples/tree/master/js13kpwa) | [live version](https://mdn.github.io/pwa-examples/js13kpwa/))

## How to

- {doc}`Debug service workers <service_workers/index>`
- {doc}`Inspect web app manifests <manifests/index>`