Firefox https error occurs on various secured HTTP sites and multiple unrelated HTTP sites. It is an indication that something on your network or system is obstructing your internet connection. It is also injecting certificates which are not reliable for Firefox. Firefox cannot trust these certificates because they seem to be invalid. Hence, it will stop the connection to the website. Simultaneously you will get an error page that your connection is not secure.

You can take assistance from our experts who are competent enough to fix firefox https error. They also provide guidance to solve other Firefox errors.

Causes of Firefox https error

There are multiple reasons that can be cited. Some of them are-

1. This error happens when the encrypted connections fail during scanning of security software. Presence of malware on your PC will interrupt your encrypted web traffic If a legitimate certificate tries to replace themselves on their own, this error takes place.
2. There can be an issue with your security software such as an antivirus.
3. There can be a configuration problem with the web server for a particular website. You may want to access a website which is using outdated TLS mechanism. At time Firefox will protect you by forbidding navigation to those sites. This happens because there exists a problem in securely establishing a connection with those sites.
4. Security products of Avast or AVG may not support the recent secure and TLS specifications required for the latest version of Firefox. If the date is not properly set on your PC, Firefox will be unable to detect whether the security certificate is valid or not. As a result, it will show this error.
5. ESET security product is also another cause in this case. A third party can also hamper your internet connection if you bypass the warning for a legitimate website.

Knowing the causes will definitely help in easy troubleshoot of the Firefox https error.

Removal of Firefox https error

Here, are some easy hacks that you can try to remove the error. In case, you find it too difficult on your part, contact the Browser support team right away.

Solution 1-

Reset the date settings on your PC to allow Firefox in detecting the validity of certificates. If a website is not using the latest TLS mechanisms, contact the owner of that site. Request them to update their TLS version to the latest and secured one.  

Solution 2-

Try not to bypass the warning for major websites where financial transactions take place. Connect to the website owner to renew the expired certificate.

Solution 3-

Turn off the ESET internet security setting and again turn it back to eliminate the error. Disable the interference of a secure connection in the settings of your Avast or AVG. If the cookies in your cache are creating the error, delete them and clear the cache.

Solution 4-

You have to update the outdated files and repair the corrupted ones. For doing this, reload the webpage and clear the cache. You can run Firefox after creating a new profile. Starting Firefox in safe mode sometimes resolves the error.

Further, update all programs on your computer and scan your PC for any malware.

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