Mozilla 最近开始 为Firefox推出基于 HTTPS^(HTTPS)的DNS，以确保DNS解析也是安全的。虽然还有更多内容，但在这篇文章中，我们将展示如何通过 HTTPS从^{(DNS over HTTPS)}Firefox DNS 中删除特定域。Firefox为^(Firefox)DoH提供了广泛的配置，尤其是对于依赖其DNS的组织。

^(Remove)通过HTTPS从^(HTTPS)Firefox DNS中^{(Firefox DNS)}删除特定域

虽然不建议这样做，但Firefox确实提供了一种添加特定域的方法，以便它们可以绕过DNS over HTTPS。但是，您需要使用Firefox配置手动添加这些域。

• 在地址栏中输入 about:config 并按 Enter。
• 接受警告页面消息
• 搜索 network.trr.excluded-domains。
• 单击^(Click)首选项旁边的编辑按钮。^(Edit)
• 将^(Add)域（以逗号分隔）添加到列表中
• 单击^(Click)复选标记以保存更改。

如果您发现列表中已经有一些网站，我们建议不要从那里删除任何内容。

何时应将域添加到例外列表？

虽然DoH通过将ISP和某人保持在公共 WiFi上来改善隐私，但在尝试使用^{(Public WiFi)}DoH时，网站可能无法为您工作。最重要的是，它对于使用自定义 DNS^{(Custom DNS)}的网络至关重要。

具有内部DNS策略的组织^(DNS)

Firefox提供的默认功能非常适合普通消费者。但是，对于组织而言，这可能不是很好。许多人依靠DNS来阻止恶意软件、启用家长控制或过滤浏览器对网站的访问。DoH绕过了所有这些，因此没有用处。此外，有些网站只有在您连接到公司网络时才能解析。

Firefox提供了一个解决方案^{(offers a solution)}——Canary域。Firefox将尝试使用设备操作系统中配置的DNS服务器解析此域。^(DNS)如果结果是否定的，这将是禁用应用程序DNS的信号，即DoH。

如果DoH导致DNS解析速度变慢

DoH可能更耗时，如果您经常发生这种情况，并且对于特定网站，您可以选择将它们添加到例外列表中。

Cloudflare 作为 DoH

在美国，Firefox使用Cloudflare作为DNS。现在任何DNS解析器都可以看到该查询，但  Firefox和Cloudflare同意禁止Cloudflare或任何其他DoH合作伙伴收集个人识别信息。如果您不满意，您有两种选择。

• 将 Cloudflare 替换^{(Replace Cloudflare)}为您信任的任何其他DNS
• 您可以通过完全取消选中它或在首次启用DoH时收到的通知中选择退出

Firefox还建议美国用户禁用Firefox研究 ( about:studies)，该研究收集数据以改善用户体验。您也可以禁用隐私^(Privacy)和安全^(Security)面板下的Firefox 数据收集 。^{(Firefox Data Collection )}

我们希望这篇文章有用，并且您能够通过HTTPS从^(HTTPS)Firefox DNS中删除特定域。

How to remove specific domains from Firefox DNS over HTTPS

Mozilla rеcеntly started rolling out DNS over HTΤPS for Fіrefox to make sure the DNS resolution is also securе. While there is more to it, in this post, we will show how you can removе specifіc domains frоm Fіrefox DNS over HTTPS. Firefox offers extensive configuration for DoH, especially for organizations that rely on their DNS.

Remove specific domains from Firefox DNS over HTTPS

While it is not recommended, Firefox does offer a way to add particular domains so they can bypass DNS over HTTPS. However, you need to add those domains using Firefox configuration manually.

• Type about:config in the address bar and press Enter.
• Accept the warning page message
• Search for network.trr.excluded-domains.
• Click the Edit button next to the preference.
• Add domains, separated by commas, to the list
• Click on the checkmark to save the change.

If you find the list already has some websites, we suggest not to remove anything from there.

When should you add domains to the exception list?

While DoH improves privacy by keeping ISP and someone on Public WiFi, it is possible that websites may not work for you when tried over DoH. On top of that, it can be crucial for networks that use Custom DNS.

An organization with in-house Policies for DNS

The default feature offered by Firefox is excellent for a general consumer. However, it may not be great for organizations. Many rely on DNS to block malware, enable parental controls, or filter your browser’s access to websites. DoH bypasses all of these, and hence not useful. Also, there are some websites which only resolve when you are connected to a company network.

Firefox offers a solution— Canary domain. Firefox will attempt to resolve this domain using the DNS server(s) configured in the operating system of the device. If it comes out negative, it will be a signal to disable application DNS, i.e., DoH.

If DoH results in a slower DNS resolution

DoH can be more time-consuming, and if it’s happening for you often, and for a particular website, you can choose to add them to the exception list.

Cloudflare as DoH

In the US, Firefox is using Cloudflare as DNS. Now any DNS resolver can see the query, but  Firefox and Cloudflare are in agreement that forbids Cloudflare or any other DoH partner from collecting personal identifying information. If you are not comfortable with it, you have two options.

• Replace Cloudflare with any other DNS you trust
• You can Opt-out by unchecking it entirely or from the notification you receive if and when DoH is first enabled

Firefox also recommends US users disable Firefox study (about:studies) which collects data to improve user experience. You may also disable Firefox Data Collection available under Privacy and Security panel.

We hope the post was useful, and you were able to remove specific domains from Firefox DNS over HTTPS.

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