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JavaScript modules

From MDC

This article covers features introduced in Firefox 3


Firefox 3 introduces the new Components.utils.import() method, which provides an easy way to import JavaScript code from an external module. There is also information on how to setup and use JavaScript modules. JavaScript modules can also be used for sharing data in extensions.

In addition to offering this method for importing modules, Firefox includes two built-in modules:

XPCOMUtils
The XPCOMUtils.jsm module provides utilities for JavaScript components loaded by the JavaScript component loader.
JSON
The JSON.jsm module provides utilities for manipulating JSON data.
PluralForm
The PluralForm.jsm module provides tools for correctly pluralizing words in multiple localizations.