将我的 Firefox 更新到 58 版后，我发现我无法打开多个网站，包括Google.com、Twitter.com、Facebook.com等。我收到错误消息 -您的连接不安全，SEC_ERROR_UNKNOWN_ISSUER^{(Your Connection is not secure, SEC_ERROR_UNKNOWN_ISSUER)}。如果您收到此错误，有两种方法可以处理它。

SEC_ERROR_UNKNOWN_ISSUER Firefox错误

1] Mozilla建议您通过在Avast、Bitdefender、ESET和Kaspersky等安全软件中禁用^(Kaspersky)SSL扫描来解决此问题。因此，您必须在安全软件中检查此设置。我在下面给出Kaspersky的例子。

打开您的卡巴斯基^(Kaspersky)软件，然后单击打开设置^(Settings)。您将在左下角看到它的图标。

选择其他 > 网络。

在网络^(Network)设置页面的加密连接扫描^{(Encrypted connections scanning)}部分下，选择不扫描加密连接^{(Do not scan encrypted connections)}。

当你这样做时，它确实会让你的系统有点不安全，因为这会降低对你计算机的保护，因为家长控制^{(Parental Control)}、URL 顾问^{(URL Advisor)}、隐私浏览^{(Private Browsing)}、Web防病毒等模块将无法控制加密连接。

在Avast打开仪表板，转到Settings > Active Protection，然后单击Web Shield旁边的自定义^(Customize)。取消选中启用 HTTPS 扫描^{(Enable HTTPS Scanning)}设置。

Bitdefender用户需要点击Modules > Web Protection > Toggle关闭扫描 SSL^{(Scan SSL)}设置。

ESET用户应禁用并重新启用SSL/TLS协议过滤或通常禁用安全连接拦截。

这只是一个指示性列表，您必须为您的安全软件相应地这样做。

2] 如果网站允许，您可以添加一个例外。

在错误或警告页面上，单击高级^(Advanced)。

准备就绪后，如果您确定要信任该站点，则必须单击“确认安全例外”。^{(Confirm Security Exception)}

重启火狐^{(Restart Firefox)}看看。警告将不再出现。

相信这对你有用。^{(Trust this works for you.)}

相关阅读^{(Related read)}：如何解决 Firefox 安全网站上与时间相关的错误^{(How to troubleshoot Time related errors on secure websites for Firefox)}。

SEC_ERROR_UNKNOWN_ISSUER warning in Firefox browser

After updating my Firefox to version 58, I found that I was unable to oрen several sites including Goоgle.com, Twitter.com, Facebook.com, etc. I received the error – Your Connection is not secure, SEC_ERROR_UNKNOWN_ISSUER. If you receive this error there are two ways you can deal with it.

SEC_ERROR_UNKNOWN_ISSUER Firefox error

1] Mozilla suggests that you resolve this issue by disabling the SSL scanning in your security software like Avast, Bitdefender, ESET, and Kaspersky. So you will have to check this setting in your security software. I am giving below the example of Kaspersky.

Open your Kaspersky software and click open Settings. You will see its icon on the bottom left side.

Select Additional > Network.

On the Network settings page, under Encrypted connections scanning section, select Do not scan encrypted connections.

When you do this, it does leave your system a bit insecure, as this will reduce the protection of your computer as modules like Parental Control, URL Advisor, Private Browsing, Web anti-virus, etc., will not be able to control encrypted connections.

In Avast open the dashboard, go to Settings > Active Protection and click Customize next to Web Shield. Uncheck the Enable HTTPS Scanning setting.

Bitdefender users need to click on Modules > Web Protection > Toggle off the Scan SSL setting.

ESET users should disable and re-enable SSL/TLS protocol filtering or generally disable the interception of secure connections.

This was just an indicative list, and you will have to do so accordingly for your security software.

2] The other option you have is to add an exception if the website allows you to.

On the error or warning page, click Advanced.

Once you are ready, you have to click Confirm Security Exception if you are sure you want to trust the site.

Restart Firefox and see. The warning will no longer appear.

Trust this works for you.

Related read: How to troubleshoot Time related errors on secure websites for Firefox.

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