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The Open Web Apps project enables developers to create rich HTML5 app experiences that run across multiple devices and form factors  (desktop, mobile, tablet, etc.) using Web standards and open technologies such as HTML5, CSS and JavaScript. Furthermore, it aims to create a rich distributed ecosystem of HTML5 app stores, including a marketplace operated by Mozilla. Mozilla aims to put  the developer back in control of every aspect of the app experience —  from easy development to distribution to direct customer relationship  management.

Apps are built using standard Web technologies with additional metadata that allows the User Agent to discover, install, launch, and grant them additional privileges.

Documentation topics

Creating apps

Apps FAQ
Frequently-asked questions about apps.
Getting started
This walk-through can quickly give you an understanding of what it takes to turn an ordinary site into an app.
For mobile application developers
If you already develop mobile applications, here's how to make Web-based apps.
For Web developers
If you already develop Web sites or applications, here's how to make them into installable apps.
App installation
Platform-specific notes about how apps are installed and run on the user's device or system.
Using apps offline
How to design apps so that they can be cached and used without an Internet connection.


Game apps

Developing game apps
Considerations for game apps, such as offline use, identity, and multi-player interaction.
Game engines and libraries
Engines and libraries useful for developing game apps.

Reference information

Apps architecture
An overview of the technology that supports apps.
The app manifest
The structure and content of the app manifest, which defines the app to the browser.
Device APIs
Application programming interfaces for device capabilities:
Apps JavaScript API
Functions (on navigator.mozApps) that websites can call to install or manage apps.

Other resources

Behind the Mozilla apps developer preview
A (now somewhat out-dated) look at how the pieces of the apps architecture fit together, from one of the lead developers.


Mozilla Marketplace

The Mozilla Marketplace is a site where developers can list their apps to be found and downloaded by end users.

Submitting an app
Step-by-step instructions, including setting a price and setting up a PayPal refund token.
Mozilla Marketplace payments
Learn about different payment options available for apps in the Mozilla Marketplace.



Web runtime

The app Web runtime provides the API functions that enable apps to be installed, managed, and run. These are built into Firefox for Mac and Windows, starting with Firefox 13. For other browsers, the Web runtime functions are provided by a JavaScript library.

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