• MOZILLA_PKIX_ERROR_MITM_DETECTED
• uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
• configured their website improperly

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

*MOZILLA_PKIX_ERROR_MITM_DETECTED

• uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
• configured their website improperly

How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

Hi can you give me a little more detail as to what those 3 points you set mean, i did not see any of those on the error page but Error code: SEC_ERROR_UNKNOWN_ISSUER. And i doubt google configured their website improperly.

Also i have been trough that page, as i mentioned it was not an antivirus problem because i don't have one, i did however install malwarebytes for a moment to check for malware as stated on the paged you linked and did find a few, but nothing relevant to the issues because i quarantined them and it didn't solve the issue. I than unnistalled the anti-virus

Maybe i didn't present my issue properly, i don't have the "Error code: SEC_ERROR_UNKNOWN_ISSUER" anymore, i solved it by importing a certificate that was missing on Firefox from Chrome(DigiCert Global Root G1A). My issue now is that after getting access to Google and Youtube, some of Youtube's functionality's stopped working. So what i would like to know is if this is related and whether it is or not, how do i fix it?

Make sure you are not blocking content.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}acking-protection-firefox-desktop

I have restarted in safe mode, cleared cookies and cache and the issue still persists.

Edit: Discovered a new error, when i search something it doesn't load my query, i need to copy the query from the address bar and paste on a new tab to get the results

Edit 2: Same thing when i enter a channel and click on any tab, i need to copy and paste on a new tab the link on the address bar in order to go there, only when i click on an actual video do i not need to do this

Okay found a solution, if you are here from Google you are welcome. So the issue was that apparently Google was sending this useless certificate the "DigiCert Global Root G1A" which is not the one that is usually used and note that you cant even find it on DigiCert's page. The one that is typically used is the "DigiCert Global CA G2"

Solution: Open Firefox->Options->General->Network settings at the bottom->tap on "No proxy"

Everything should be okay now, just restart Firefox and you are good to go.

Solution source: https://www.reddit.com/r/techsupport/.../googlecom_sends_a_certificate_issued_by_digicert/

So i found a solution, all you have to do is tap on "no proxy" in network settings.

Solution source: https://www.reddit.com/r/techsupport/.../googlecom_sends_a_certificate_issued_by_digicert

So i found a solution, all you have to do is tap on "no proxy" in network settings.

Yes, the true Google servers send a Google certificate, not a Digicert certificate. There was a "man in middle" via proxy. (Other users have reported this, but we don't know who is behind it.)