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# 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>`