An Overview of Open Web Applications for Developers
These "web apps" will be available as both paid and free downloads, and at this point it looks like almost all web browsers will support them. They utilize a combination of both server-side and client-side logic, and are poised to take advantage of the popularity of mobile devices as well as more traditional desktop-based web browsers.
How Does a Mobile App Work?Both the Google Chrome Store and the Mozilla Open Web App Store work the same way. A user looks through an app directory, selects, pays for, and downloads an app (or if the app is free, selects and downloads it), and receives the application in a "dashboard" of sorts in their web browser. When the user launches the app from that dashboard, the app verifies the ownership of the app instantly, and the app starts up.
The Google Chrome StoreThe Chrome Store, when it opens, will work essentially the same way as all app stores. Users locate, purchase, download, install and use. The method used to verify ownership is through the use of a special file, called a .crx file--created by the Chrome Web Store--that is signed and contains an auto-update URL. When the user downloads a .crx file that is created by the store for a particular app, the app will only be installed if the .crx file is coming from the Chrome Web Store. If someone tries to use a .crx file they downloaded from a .torrent site, for instance, they will not be able to be installed on their browser.
If a developer wants to sell apps from the Chrome Store, they must open a merchant account with Google Checkout, and associate that account with the store. When someone buys their app and uses Chrome Web Store Payments, Google charges them a processing fee of 5% plus a transaction fee of $.30 cents.
It sounds simple, however Mozilla offers several models for developers: self-published, free and registered apps. For self-published apps, the App Store repository prompts the user for confirmation, and once done, it adds the app to the user's dashboard, and if the app needs additional permissions, they are confirmed before the app is installed.
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