Sec_error_unknown_issuer Firefox Fix For Mac

Are you seeing ‘ SECERRORUNKNOWNISSUER ‘ error code in Firefox window? If you are seeing this error, then you can’t access any website using Firefox, unless you fix this issue. The main culprit behind this problem is security.enterprises root certificate, which when disabled causes this trouble.
This is what i get as an warning in Mozilla Firefox when trying to load my web site: vozilo.rs uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown.

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Fixing SECERRORUNKNOWNISSUER for Site Owners Regardless of whether you’re getting this error because of a legacy Symantec certificate or just because your certificate’s CA isn’t trusted by Firefox, you really only have one choice: You need to get another certificate. Firefox Developer Edition. Get the Firefox browser built just for developers. Check out the home for web developer resources. Firefox Reality. Explore the web with the Firefox browser for virtual reality. Donate your voice so the future of.

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Publication date: 29.01.2018
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If you have recently updated to Firefox version 58, you may have noticed an annoying error code when visiting websites. ‘SEC_ERROR_UNKNOWN_ISSUER’ (Your Connection is Not Secure)isn’t all that common, however, after updating Firefox, you may start to see it more frequently, even on popular websites like Google.com. Thankfully there are a few simple ways you can fix the issue.

Although Firefox is the underdog in the browser market, it is one of the best browsers on the market. It’s fast, has a very clean interface, and uses significantly fewer resources than the top dog Chrome. As good as it is though, Firefox does have an annoying bug/error which affects a small percentage of users.

Error ‘SEC_ERROR_UNKNOWN_ISSUER’ has been around for quite some time, however, was very rare to see on Firefox 57, in most instances the issue was caused by the websites settings and not Firefoxes. Thankfully, regardless of the reason you are seeing this error message, there are a few different ways you can fix it.

How to Fix 'SEC_ERROR_UNKNOWN_ISSUER' & ‘Your Connection is Not Secure’ Error Messages on Firefox 58.

Sec_error_unknown_issuer Firefox Fix For Mac

To remove this error from Firefox there are two different options available. The first is to add an exception for the website to your Antiviruses exception list. The second is to disable SSL/HTTPS scanning, again in your antivirus settings. Option one is by far the least risky and doesn’t open up a potential security flaw in your system. Option two, however, will save you having to add every website to the exception list. Before using either of these steps, make sure you have uninstalled Firefox and reinstalled it from scratch. If you are using a Firefox account it won’t take much time at all to set up your browser again.

Note: You can also try browsing the website using a New Private Window by right-clicking on the Firefox icon and selecting New Private Window.

How to Add Websites to Your Antivirus Exception List to Fix Firefox ‘SEC_ERROR_UNKNOWN_ISSUER’ & ‘Your Connection is Not Secure’ Errors.

This process will differ a little depending on the antivirus program you are using, however, the option should be under a very similar heading. Below you will find an example of how to add a website to Avast’s exceptions list. To begin open Avast, stay on the Status tab, then click Settings at the bottom of the page.

On the next page stay on the General tab and expand the Exclusions section using the drop-down arrow. Now simply change to the URLs tab and add the website you can’t get access to, to the list.

Note: Depending on the website, Firefox may allow you to add an exception directly from the error message. Simply click Advanced > Add Exception and manually add the website URL.

How to Disable SSL/HTTPS Scanning to ‘Fix SEC_ERROR_UNKNOWN_ISSUER’ & ‘Your Connection is Not Secure’ Errors on Firefox 58.

As we mentioned above, this isn’t the most recommended or safest solution, but it will get rid of the error on your browser. (Again these steps will vary somewhat depending on the antivirus software you are using). Below you will find an example of how to add a website to Avast’s exceptions list.

Open Avast, stay on the Status tab and click Settings at the bottom of the page.