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SEC_ERROR_UNKNOWN_ISSUER warning in Firefox browser

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After updating my Firefox to version 58, I industrial plant life that I was unable to opened upward several sites including Google.com, Twitter.com, Facebook.com, etc. I received the fault – Your Connection is non secure, SEC_ERROR_UNKNOWN_ISSUER. If you lot have this fault at that topographic point are ii ways you lot tin bargain amongst it.

SEC_ERROR_UNKNOWN_ISSUER Firefox error

1] Mozilla suggests that you lot resolve this lawsuit past times disabling the SSL scanning inward your safety software similar Avast, Bitdefender, ESET, as well as Kaspersky. So you lot volition bring to depository fiscal establishment fit this setting inward your safety software. I am giving below the illustration of Kaspersky.

Open your Kaspersky software as well as click opened upward Settings. You volition run into its icon on the bottom left side.

Select Additional > Network.

 I industrial plant life that I was unable to opened upward several sites including Google SEC_ERROR_UNKNOWN_ISSUER alert inward Firefox browser

On the Network settings page, nether Encrypted connections scanning section, choose Do non scan encrypted connections.

 I industrial plant life that I was unable to opened upward several sites including Google SEC_ERROR_UNKNOWN_ISSUER alert inward Firefox browser

When you lot produce this, it does move out your organization a fleck insecure, every bit this volition trim the protection of your figurer every bit modules similar Parental Control, URL Advisor, Private Browsing, Web anti-virus, etc., volition non hold upward able to command encrypted connections.

In Avast opened upward the dashboard, teach to Settings > Active Protection as well as click Customize side past times side 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 as well as re-enable SSL/TLS protocol filtering or mostly disable the interception of secure connections.

This was simply an indicative list, as well as you lot volition bring to produce thus accordingly for your safety software.

2] The other pick you lot bring is to add together an exception if the website allows you lot to.

On the fault or alert page, click Advanced.

 I industrial plant life that I was unable to opened upward several sites including Google SEC_ERROR_UNKNOWN_ISSUER alert inward Firefox browser
Next, click Add Exception. The Add Security Exception dialog box volition open.

 I industrial plant life that I was unable to opened upward several sites including Google SEC_ERROR_UNKNOWN_ISSUER alert inward Firefox browser
You tin click Get certificate as well as thus on View if you lot desire to run into the certificate.

Once you lot are ready, you lot bring to click Confirm Security Exception if you lot are certain you lot desire to trust the site.

Restart Firefox as well as see. The alert volition no longer appear.

Trust this works for you.

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


Source: https://www.thewindowsclub.com/
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