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    Firefox 19 for developers

    Firefox 19已于2013年2月19日正式发布.

    Web开发者需要注意的变化

    JavaScript

    CSS

    DOM

    XForms

    删除了对XForms的支持.

    附加组件和Mozilla开发者需要注意的变化

    注: A key change in Firefox 19 is that nsresult is now strongly typed. This will help make it easier to detect bugs that are caused by mishandling of return values, but may cause existing code to break if it's making incorrect assumptions in this regard.

    • getBrowserSelection() now returns the selected text in a text input field. As a result, gContextMenu.isTextSelected will be true when the user selects text in a text input field that is not a password field. (bug 565717)
    • Dict.jsm: Dict() now takes a JSON String. Dict.toJSON() was added, and it returns a JSON String. (bug 727967)

    接口变化

    nsIImgLoadingContent
    The parameter (aObserver) of addObserver() method changes from imgIDecoderObserver to imgINotificationObserver. The notify() method of imgINotificationObserver is not scriptable, so you need to use createScriptedObserver() from imgITools.
    nsIChannel
     contentLength 属性的类型由 long 改成 int64_t.

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