Try to delete this file while Firefox is closed to regenerate it. You may also see certificate error messages when the file in your profile folder that stores your certificates (cert8.db) has become corrupted.

On sites which certificate cannot be validated, you might be given the option to add an exception. On sites with a weak encryption you will then be shown an option to load the site using outdated security. They claim one of the ways to resolve this is to disable HTTPS scanning. They claim its a bug caused by an antivirus software such as Avast (Even though I don't use Avast or similar AV). Honestly I am not convinced about their explanation, that funny thing it never allow you to browse Google websites, and I doubt if this is certificate issues (some conspiracy maybe - a similar thing that Google uses when you are browsing under a VPN it never stops sending those captcha verification dialogs). The connection to the website and instead show an error page: Validated or if the encryption is not strong enough, Firefox will stop Website is valid and that the encryption is strong enough toĪdequately protect your privacy. Previously, clicking Advanced would give you the option to ignore it but this cant be done as I get the following message:- 'This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox only connect to it securely. One of the ones I get it with is Facebook. ' it must verify that the certificate presented by the Since updating to 2019 version I have been getting 'Insecure Connection' with some websites using Firefox. When Firefox connects to a secure website (the URL begins with I have been having this error (just a time I tried to use Firefox browser), and I consulted their website and here's what they had to say: You might need to Uncheck and Check again the 'Check URLs' to take effect. Go to Settings > Web Anti-Virus > Advanced Settings > Configure trusted web sites > add as active: * (substitute your country code) Kaspersky is well known for this problem.

Instead, FireFox is distributed with a complete list of all CAs Trust the OS's cert store, precisely because it is so easy to install a fake Unfortunately, FireFox is the only mainstream web browser that refuses to This is where most software looks to validate the Certificate Authority that It installs the certificate into the OS certificate store, because So for now i will use this, but either its firefox's fault or Sophos XG bug. Version 53.02 doesnt even give an option to add an exception. so that i can atleast open and use gmail and youtube and other https related websites. Generates its own root CA certificate and feeds spoofed certificates on the fly to your browser. I just installed version 51.0.1 and it still shows an insecure connection but atleast this version lets me add an exception. In order to be able to scan payloads in HTTP transactions, the anti-virus This problem is typically caused by your anti-virus trying to protect you

Firefox insecure connection all sites