Today in browsers, various mechanisms exist to access and modify a web page. These can be implemented normally via extensions who employ various DOM access technologies such as Mutation Observers. This feature, for example, allows an extension to detect the life-cycles of DOM elements and augment them or even insert its own DOM elements at appropriate times and locations.Today in browsers, various mechanisms exist to
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移动：访问/共享/修改其他应用中的内容/元素
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