为什么所有浏览器的用户代理都以“Mozilla /”开头？ [英] Why do all browsers' user agents start with "Mozilla/"?

问题描述

所有流行的浏览器的用户代理字符串，甚至是Internet Explorer，都以 Mozilla / 开头。为什么会出现这种情况？

总结：

1. 使用User-Agent Mozilla / 1.0（Win3.1）发布Mozilla浏览器。它被公开重命名为Netscape，但在它的用户代理中它保留了原来的名字。


2. Internet Explorer被释放。它使用 Mozilla / 启动它的User-Agent来欺骗Netscape，因为Web服务器通常是浏览器嗅探和服务页面的框架 - Netscape和IE支持的一个功能，浏览器的时代 - 只有Netscape。
   
3. 随着时间的推移，Gecko，Konqueror，Opera，Safari和Chrome各自决定同样欺骗一些以前的浏览器的用户代理，以操纵浏览器浏览网页正确理解浏览器的功能。作为这种欺骗的一部分，所有浏览器都使用 Mozilla / 来启动它们的用户代理，就像之前的浏览器一样。还有很多其他的废话，比如现代的Chrome的用户代理同时声称是Mozilla，Chrome，Safari和像Gecko。
   

All popular browsers' user agent strings, even Internet Explorer's, start with Mozilla/. Why is this the case?

解决方案

It is a long and sad story.

In summary:

1. Mozilla browser gets released, with User-Agent Mozilla/1.0 (Win3.1). It is publicly renamed to Netscape, but in its User-Agent it keeps its original name .
2. Internet Explorer is released. It spoofs Netscape by starting its User-Agent with Mozilla/ because web servers were routinely browser sniffing and serving pages with frames - a feature supported by both Netscape and IE, but not other browsers of the era - to Netscape only.
3. Over time, Gecko, Konqueror, Opera, Safari and Chrome each decide to similarly spoof the User-Agent of some previous browser in order to manipulate browser-sniffing web pages into correctly understanding their browser's features. As part of this spoofing, all the browsers start their User-Agents with Mozilla/, like the browsers before them had done. Plenty of other nonsense also results, like modern Chrome's User-Agent simultaneously claiming to be Mozilla, Chrome, Safari, and 'like Gecko'.

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