许多浏览器软件扩展提供不仅仅是搜索帮助，也可以作用于你正在浏览的网页，也因此相互作用。
Many browser software extensions go beyond this search help and can interact with the content of the web pages you are looking at and react accordingly.
LibX浏览器工具栏，由Virginia Tech开发，在工具栏搜索中结合了相互作用的特性，创建了目前所有的最复杂的工具栏。
The LibX browser toolbar, developed by Virginia Tech, incorporates interactive features with toolbar search to create the most sophisticated research toolbar yet devised.
浏览器通过添加对HTML语言的扩展来相互竞争。
Browsers competed by adding extensions to the HTML language.
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