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I cannot connect to download.mozilla.org

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Hello,

For at least a week or two now, my Firefox has been unable to update. So yesterday I tried to actually download a copy of Firefox, and when I tried to connect to the download page, I received this error.

"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Secure Connection Failed

An error occurred during a connection to download.mozilla.org. The server uses key pinning (HPKP) but no trusted certificate chain could be constructed that matches the pinset. Key pinning violations cannot be overridden. Error code: MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

I tried using Firefox, Edge, and Chrome to download Firefox and none of them worked. Chrome provides a little more information:

"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" This server could not prove that it is download.mozilla.org; its security certificate is from *.demandbase.com. This may be caused by a misconfiguration or an attacker intercepting your connection. """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

So, out of desperation, I asked a friend (I live in New Jersey, he is relatively close to me and also lives in New Jersey) if he could download Firefox and he had no trouble. At this point I am forced to assume that either my internet service provider (Optimum) or something else is interfering with my connection and I am unsure what to do about it.

Has anyone experienced this kind of problem before?

Dan

Hello, For at least a week or two now, my Firefox has been unable to update. So yesterday I tried to actually download a copy of Firefox, and when I tried to connect to the download page, I received this error. """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Secure Connection Failed An error occurred during a connection to download.mozilla.org. The server uses key pinning (HPKP) but no trusted certificate chain could be constructed that matches the pinset. Key pinning violations cannot be overridden. Error code: MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem. """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" I tried using Firefox, Edge, and Chrome to download Firefox and none of them worked. Chrome provides a little more information: """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" This server could not prove that it is download.mozilla.org; its security certificate is from *.demandbase.com. This may be caused by a misconfiguration or an attacker intercepting your connection. """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" So, out of desperation, I asked a friend (I live in New Jersey, he is relatively close to me and also lives in New Jersey) if he could download Firefox and he had no trouble. At this point I am forced to assume that either my internet service provider (Optimum) or something else is interfering with my connection and I am unsure what to do about it. Has anyone experienced this kind of problem before? Dan

Ausgewählte Lösung

the fake certificate is coming from demandbase.com which apparently is a marketing company. in case you're using any software that is promising rewards fro monitoring your browsing behaviour, please try to remove it from your system. otherwise try a security scan with adwcleaner & malwarebytes: Troubleshoot Firefox issues caused by malware

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Mehr Details zum System

Installierte Plugins

  • Shockwave Flash 32.0 r0

Anwendung

  • Firefox 67.0.2
  • User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0
  • Hilfe-URL: https://support.mozilla.org/1/firefox/67.0.2/WINNT/en-US/

Erweiterungen

  • HTTPS Everywhere 2019.6.4 (https-everywhere@eff.org)
  • Privacy Badger 2019.2.19 (jid1-MnnxcxisBPnSXQ@jetpack)
  • uBlock Origin 1.19.6 (uBlock0@raymondhill.net)

JavaScript

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FredMcD
  • Top 10 Contributor
4186 Lösungen 58437 Antworten
Veröffentlicht
There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own. https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message [https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors?redirectlocale=en-US&redirectslug=Error+loading+web+sites Websites don't load - troubleshoot and fix error messages] http://kb.mozillazine.org/Error_loading_websites [https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean What do the security warning codes mean]
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Fragesteller

Hi FredMcD,

That got me thinking, so I tried, from my same internet connection, using my laptop to download firefox instead of my desktop. That worked. Both machines are Windows 10.

But if the problem is isolated to my desktop, any idea how to figure out what's doing it? I am using Windows defender, I've never installed (to my knowledge) any kind of extra antivirus or security software.

-Dan

Hi FredMcD, That got me thinking, so I tried, from my same internet connection, using my laptop to download firefox instead of my desktop. That worked. Both machines are Windows 10. But if the problem is isolated to my desktop, any idea how to figure out what's doing it? I am using Windows defender, I've never installed (to my knowledge) any kind of extra antivirus or security software. -Dan
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philipp
  • Top 25 Contributor
  • Moderator
5280 Lösungen 23327 Antworten
Veröffentlicht

Ausgewählte Lösung

the fake certificate is coming from demandbase.com which apparently is a marketing company. in case you're using any software that is promising rewards fro monitoring your browsing behaviour, please try to remove it from your system. otherwise try a security scan with adwcleaner & malwarebytes: Troubleshoot Firefox issues caused by malware

the fake certificate is coming from demandbase.com which apparently is a marketing company. in case you're using any software that is promising rewards fro monitoring your browsing behaviour, please try to remove it from your system. otherwise try a security scan with adwcleaner & malwarebytes: [[Troubleshoot Firefox issues caused by malware]]
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TyDraniu
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This certificate *.demandbase.com is not our. Go to Options -> Privacy & Security -> Show certificates -> Maybe there will be this cert to delete.

This certificate *.demandbase.com is not our. Go to Options -> Privacy & Security -> Show certificates -> Maybe there will be this cert to delete.
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Fragesteller

Hi Guys,

On a whim, I decided to go through all my Windows apps and features and delete anything that I didn't recognize.

The problem is now fixed. Kind of embarrassing, because I am very particular about what gets installed on my computer.

Anyway, I'm going to wrap up with a full malware scan to be safe. None of this would have occurred to me to try without your inputs, so thanks for the help!

-Dan

Hi Guys, On a whim, I decided to go through all my Windows apps and features and delete anything that I didn't recognize. The problem is now fixed. Kind of embarrassing, because I am very particular about what gets installed on my computer. Anyway, I'm going to wrap up with a full malware scan to be safe. None of this would have occurred to me to try without your inputs, so thanks for the help! -Dan
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