虽然我们可能不会想太多，但在“幕后”发生的事情比我们浏览互联网时可能意识到的要多得多。在今天的超级用户问答中，我们将探讨浏览器忙于联系未知的第三方网站的原因。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

问题

超级用户读者Fsaladin想知道为什么浏览器未经允许自动联系未知的第三方网站：

When I visit a website, everything connects as it should, however, I notice that my browser also contacts unknown third-party websites automatically. In Mozilla Firefox, an extension called Lightbeam shows the third-party websites that my browser contacted without my permission. I visited 15 websites and my browser automatically contacted nearly 50 other third-party websites.

What is the reason behind this? Can anybody explain?

这是怎么回事？为什么Fsaladin的浏览器会在未经允许的情况下自动联系这么多未知网站？

答案

超级用户贡献者矛盾修饰法为我们提供了答案：

There are many different reas***.

1. Almost all the ads you see come from third-parties.

2. The developers of the website may use third-party libraries to achieve their goals, such as jQuery and others.

3. The website may depend on data from another website, such as an API.

The complete list is extensive, however these three are the main reas***. Most are harmless and nothing to worry about, however, one should always educate themselves about the dangers just in case.

尽管我们大多数人在浏览互联网时都只专注于工作或娱乐，但“幕后”发生的事情比我们可能意识到的要多得多，也比我们花时间去思考的要多。

有什么要补充的解释吗？在评论中发出声音。想从其他精通技术的Stack Exchange用户那里了解更多答案吗？在这里查看完整的讨论主题。