If you use Firefox and you don’t want it to keep track of every site you’ve visited, you can configure the browser to always use private browsing mode. Once you close all of your Firefox windows, none of your browsing history will be saved. Here’s how to enable it.
如果您使用Firefox，并且不想让它跟踪您访问过的每个站点，则可以将浏览器配置为始终使用私有浏览模式。 关闭所有Firefox窗口后，将不会保存任何浏览历史记录。 启用它的方法如下。
什么是私人浏览模式？ (What is Private Browsing Mode?)
Private browsing mode is a mode in Firefox that does not store your browsing history, download history, filled-out forms, searches, and other types of local data between browser sessions. (A browser session ends when you completely close all Firefox windows.) In fact, Firefox will not store your browsing history even within the browser session either, aside from a list of recently closed tabs that gets reset when you fully exit Firefox.
私有浏览模式是Firefox中的一种模式，它不会在浏览器会话之间存储您的浏览历史记录，下载历史记录，填写的表单，搜索以及其他类型的本地数据。 (当您完全关闭所有Firefox窗口时，浏览器会话将结束。)事实上，Firefox甚至在浏览器会话中也不会存储您的浏览历史记录，除了最近关闭的选项卡列表，当您完全退出Firefox时，这些选项卡会重置。
Private browsing mode is most useful when you share a computer with others, and you do not want them to see what websites you’ve been visiting. However, it does not prevent your browsing activity from being tracked in other ways—including by your ISP, through your router, and by websites that track your IP address.
当您与他人共享计算机并且不希望他们看到您正在访问的网站时，专用浏览模式最有用。 但是，它不会阻止您以其他方式跟踪您的浏览活动 -包括您的ISP，您的路由器以及跟踪您IP地址的网站。
如何在Firefox中始终使用私有浏览模式 (How to Always Use Private Browsing Mode in Firefox)
First, open Firefox. Click the hamburger icon in the upper-right corner of the window. (A hamburger icon looks like three horizontal lines sandwiched together.)
首先，打开Firefox。 单击窗口右上角的汉堡图标。 (一个汉堡包图标看起来像是三个水平线夹在中间。)
When a menu pops up, select “Options.”
弹出菜单时，选择“选项”。
On the Options page, switch to “Privacy & Security” settings by clicking on the padlock icon in the sidebar.
在选项页面上，通过单击侧栏中的挂锁图标切换到“隐私和安全性”设置。
On the “Privacy & Security” page, scroll down until you find the “History” section. Click the drop-down menu beside “Firefox Will” and select “Use Custom Settings For History.”
在“隐私和安全性”页面上，向下滚动直到找到“历史记录”部分。 点击“ Firefox Will”旁边的下拉菜单，然后选择“对历史记录使用自定义设置”。
With “Custom Settings” selected, look beneath the drop-down menu. Check the box beside “Always Use Private Browsing Mode.”
选择“自定义设置”后，在下拉菜单下方查看。 选中“始终使用私有浏览模式”旁边的框。
Upon clicking the checkbox, Firefox will ask to restart the browser. Click “Restart Firefox Now.”
单击复选框后，Firefox将要求重新启动浏览器。 单击“立即重新启动Firefox”。
Once Firefox restarts, private browsing mode will always be enabled.
Firefox重新启动后，将始终启用私人浏览模式。
To confirm this, return to Options > Privacy & Security > History. There should be a check mark in the box beside “Always Use Private Browsing Mode.”
要确认这一点，请返回选项>隐私和安全>历史记录。 在“始终使用私有浏览模式”旁边的框中应该有一个复选标记。
Now you’re good to go. Just remember to close all of your browser windows when you are finished with your session.
现在您可以开始了。 完成会话后，请记住要关闭所有浏览器窗口。
If multiple people use your PC or Mac, it’s a good idea to set up a custom user account for each person, so that everyone’s browsing history will be managed separately. The instructions are different on a Windows 10 machine and on a Mac, but the results are the same: more privacy and less fighting over how the computer is configured.
如果有多个人使用您的PC或Mac，则最好为每个人设置一个自定义用户帐户，这样将分别管理每个人的浏览历史记录。 Windows 10机器和Mac 上的说明不同，但是结果是相同的：更多的隐私和更少的计算机配置问题。
翻译自: https://www.howtogeek.com/676925/how-to-always-start-mozilla-firefox-in-private-browsing-mode/