HTTP协议漏洞百出：Firefox可直接禁用
我们能打开各种各样的网站获取信息，HTTP(超文本传输)协议功不可没，诞生于1991年的它构成了连接互联网与网民的通道，我们天天在浏览器里输入的各种网址，绝大部分走的都是这个协议。
不过已经走过29年的HTTP协议，最大问题就是不安全，没有加密传输，很容易导致漏洞攻击、网络诈骗等，于是就有了HTTPS，利用TLS(早起是SSL)进行加密保护，如今已经得到大多数网站的支持。
如果你的网站还是停留在HTTP时代，那就要赶紧行动了，浏览器们已经准备抛弃你。
最新的Firefox 76 Nightly内部版已经增加了一个实验性的新选项，开启后将仅支持HTTPS协议，而直接屏蔽所有HTTP协议的网站。
这个功能目前还是隐藏的，访问它需要首先在Firefox浏览器地址栏输入：
about:config
然后搜索找到如下选项：
dom.security.https_only_mode
它默认是关闭的(false)，可以手动开启，然后你的Firefox 76浏览器就只能打开HTTPS协议网址，试图访问HTTP协议网站的时候会给出"安全连接失败"(Secure Connection Failed)的错误提示。
Mozilla没有透露未来何时会公开提供这一选项，以及何时默认开启，相信只是个时间问题，Chrome 68开始就已经将HTTP网站标记为不安全了。另外，Chrome、Firefox还都在推进禁用FTP传输协议，Firefox 77开始就会默认关闭它。
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