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How to make it STOP giving me "Connection Not Secure" screen?

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Made the stupid mistake of actually "upgrading" Firefox. Now I can't get rid of the this stupid f**king message "Connect Not Secure...blah, blah, blah" screen appearing all the f**king time!!! How do I get rid of this bulls**t!!!???

 What is it about the concept of JUST_F**KING_WORK that is so difficult for software designers to understand??

I tried "loading the Polish version of Firefox" as some idiot suggested. Didn't work... I tried doing about:config and turning off every and all so-called security option. Didn't work...

How do I get rid of this bulls**t!!!??? How do I get rid of this bulls**t!!!??? How do I get rid of this bulls**t!!!??? How do I get rid of this bulls**t!!!???

Made the stupid mistake of actually "upgrading" Firefox. Now I can't get rid of the this stupid f**king message "Connect Not Secure...blah, blah, blah" screen appearing all the f**king time!!! How do I get rid of this bulls**t!!!??? What is it about the concept of JUST_F**KING_WORK that is so difficult for software designers to understand?? I tried "loading the Polish version of Firefox" as some idiot suggested. Didn't work... I tried doing about:config and turning off every and all so-called security option. Didn't work... How do I get rid of this bulls**t!!!??? How do I get rid of this bulls**t!!!??? How do I get rid of this bulls**t!!!??? How do I get rid of this bulls**t!!!???

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Let's get to the bottom of it.

On the error page, click the Advanced button to show more detailed error information. Copy/paste that into a reply.

If you see the code SEC_ERROR_UNKNOWN_ISSUER in that section:

There likely is a "man in the middle." It could be your security software or malware. This article lists common causes: How to troubleshoot security error codes on secure websites.

Anything relevant there? If not, click SEC_ERROR_UNKNOWN_ISSUER to show the code version of the certificate. You can click the copy button and paste that into a reply. I generally use this site to decode the certificate for clues as to its source: https://certlogik.com/decoder/