Mozilla/extensions

Mozilla 扩展是能为 Mozilla 程序（例如 Firefox 和 Thunderbird）添加新功能的小巧的附加软件。从工具栏按钮到全新特性，它们能添加任何东西。它们允许用户定制程序，以适合自己的个性需要（如果他们需要新的特性）；同时又保持了程序的小巧，以便下载。

扩展不同于插件，插件帮助浏览器现实类似于播放多媒体文件这样的特定的内容。扩展也不同于搜索插件，搜索插件在搜索栏插入附加的搜索引擎。

简单讲，XPCOM + XUL + JavaScript + CSS = Add-ons

扩展

这些开发扩展能更好的帮助开发者开发扩展：

• DOM Inspector, used to inspect and edit the live DOM of any web document or XUL application (Firefox and Thunderbird)
• Venkman, a JavaScript Debugger (Firefox version, Thunderbird version)
• Extension Developer's Extension a suite of tools for extension development (Firefox)
• Extension Test an add-on which makes it easier to detect problems which will lead to rejection by addons.mozilla.org
• Console² enhanced JavaScript console (Firefox version, Thunderbird version)
• Javascript Command for writing/testing javascript on Firefox windows
• Chrome List navigate and view files in chrome:// (Firefox version, Thunderbird version)
• Chrome Edit Plus a user file editor (Firefox and Thunderbird)
• Add-on Builder a web-based application that generates an extension skeleton (Firefox, Thunderbird, and others)
• Firebug a variety of development tools (Firefox)
• Pentadactyl, a general purpose extension with builtin tools for extension development, including a command line with chrome JavaScript evaluation (including property and function argument completion) and the ability to demand-load external JavaScript and CSS files into window chrome.
• Chromebug combines elements of a JavaScript debugger and DOM (Firefox, "kinda works for Thunderbird")
• MozRepl explore and modify Firefox and other Mozilla apps while they run (Firefox and Thunderbird)
• ExecuteJS an enhanced JavaScript console (Firefox version, Thunderbird version)
• XPCOMViewer an XPCOM inspector (Firefox and Thunderbird)
• JavaScript shells to test snippets of JavaScript (Firefox and Thunderbird)
• SQLite Manager to manage the SQLite database (Firefox and Thunderbird)
• ViewAbout enables access to various about: dialogs from the View menu (Firefox version, Thunderbird version )
• Crash Me Now! useful for testing debug symbols and the crash reporting system (Firefox and Thunderbird)

第一个扩展

完成第一个Firefox扩展: Hello World!

连接

• Mozilla Extensions
• Add-on Developer Hub
• Firefox addons developer guide
• 实战 Firefox 扩展开发

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