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Can't Connect To Any Mozilla.org Websites

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Symptom: I cannot connect to any Mozilla.org websites. I cannot update Firefox. I cannot get any Mozilla approved add-ons to download. I have tried to connect to Mozilla.org using all of the Big Three browsers out there and I have the same problem of not being able to connect to Mozilla.org or any of Mozilla's affiliated websites on any of the browsers. I am using Windows 10 and currently have the Firefox 68.0.1build. I have separately ran three different top-tier antivirus programs on my desktop PC and nothing noteworthy was found. I completely uninstalled the antivirus programs and still no connection to Mozilla.org. I tried DNS flush and tried a different DNS server, I tried resetting the modem and router, checked the PC's date and time settings, ensured that no parental controls were enabled, ensured that JavaScript was enabled, removed all Firefox extensions, restarted Firefox in safe mode, uninstalled and reinstalled Firefox and still have the same problem. I tried connecting to Mozilla.org with a free online proxy VPN and was finally successful although Mozilla's GUI didn't completely load correctly. I am able to quickly and efficiently connect to every other website on the web with any browser including Firefox, but none of the web browsers including Firefox will connect to any Mozilla affiliated or Mozilla extension websites on my PC. When trying to access any Mozilla.org website, the page buffers for several minutes and then the page display's the error code PR_CONNECT_RESET_ERROR. Sometimes I get an auto-update message on my Firefox browser that states that a new version is available and so I click to download the new version and all I get is buffering and no downloading. Then a new message appears after a few minutes stating that Firefox didn't download correctly and that I need to reinstall Firefox. I uninstall Firefox but cannot access any Mozilla.org website to reinstall Firefox because after clicking the link to access the Mozilla webpage there is nothing but buffer and no access. Using the free online web based VPN I was able to reinstall Firefox, but I still have to same issues. If I run Windows 10 in safe mode with networking I am able to access all Mozilla.org websites and install Firefox extensions. Is there any known fix to get this issue fixed while running my PC in normal mode apart from completely uninstalling and reinstalling Windows?

Symptom: I cannot connect to any Mozilla.org websites. I cannot update Firefox. I cannot get any Mozilla approved add-ons to download. I have tried to connect to Mozilla.org using all of the Big Three browsers out there and I have the same problem of not being able to connect to Mozilla.org or any of Mozilla's affiliated websites on any of the browsers. I am using Windows 10 and currently have the Firefox 68.0.1build. I have separately ran three different top-tier antivirus programs on my desktop PC and nothing noteworthy was found. I completely uninstalled the antivirus programs and still no connection to Mozilla.org. I tried DNS flush and tried a different DNS server, I tried resetting the modem and router, checked the PC's date and time settings, ensured that no parental controls were enabled, ensured that JavaScript was enabled, removed all Firefox extensions, restarted Firefox in safe mode, uninstalled and reinstalled Firefox and still have the same problem. I tried connecting to Mozilla.org with a free online proxy VPN and was finally successful although Mozilla's GUI didn't completely load correctly. I am able to quickly and efficiently connect to every other website on the web with any browser including Firefox, but none of the web browsers including Firefox will connect to any Mozilla affiliated or Mozilla extension websites on my PC. When trying to access any Mozilla.org website, the page buffers for several minutes and then the page display's the error code PR_CONNECT_RESET_ERROR. Sometimes I get an auto-update message on my Firefox browser that states that a new version is available and so I click to download the new version and all I get is buffering and no downloading. Then a new message appears after a few minutes stating that Firefox didn't download correctly and that I need to reinstall Firefox. I uninstall Firefox but cannot access any Mozilla.org website to reinstall Firefox because after clicking the link to access the Mozilla webpage there is nothing but buffer and no access. Using the free online web based VPN I was able to reinstall Firefox, but I still have to same issues. If I run Windows 10 in safe mode with networking I am able to access all Mozilla.org websites and install Firefox extensions. Is there any known fix to get this issue fixed while running my PC in normal mode apart from completely uninstalling and reinstalling Windows?

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That was very good work. Well done. Please flag your last post as Solved Problem as this could help others with similar problems.

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 32.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0

More Information

FredMcD
  • Top 10 Contributor
4224 solutions 58969 answers
Bing search https://www.bing.com/search?q=PR_CONNECT_RESET_ERROR ''This simply means, that the peer or some middlebox in between (firewall) is terminating the connection.'' 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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Question owner

I'm using the same "peer" "middlebox" and firewall on a second PC hardwired to the same router, same modem, same A/V and same ip address and have no issues with Firefox. I might add, that that all of my usernames are auto-filling even when the option is toggled off in Firefox privacy settings.

I'm using the same "peer" "middlebox" and firewall on a second PC hardwired to the same router, same modem, same A/V and same ip address and have no issues with Firefox. I might add, that that all of my usernames are auto-filling even when the option is toggled off in Firefox privacy settings.
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FredMcD
  • Top 10 Contributor
4224 solutions 58969 answers

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.

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

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. * [https://support.mozilla.org/en-US/kb/delete-cookies-remove-info-websites-stored Delete cookies to remove the information websites have stored on your computer] {web link} * [https://support.mozilla.org/en-US/kb/how-clear-firefox-cache How to clear the Firefox cache] {web link} If there is still a problem, '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]''' {web link} by holding down the '''<Shift> ''(Mac=Options)''''' key, and then starting Firefox. A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Did this help? While you are in safe mode; Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches. ''[https://support.mozilla.org/en-US/kb/forum-response-disable-hardware-acceleration How to disable Hardware Acceleration]'' {web link}
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cor-el
  • Top 10 Contributor
  • Moderator
17416 solutions 157342 answers

It is possible that your IP got included in a IP block due to possible DDOS attack that happened when you accessed a Mozilla website. If you can access via a VPN then this can be an indication that your IP is blocked. Such a ban shouldn't last very long (only a few days at most). You would have to contact Mozilla via IRC or email to check this out.

It is possible that your IP got included in a IP block due to possible DDOS attack that happened when you accessed a Mozilla website. If you can access via a VPN then this can be an indication that your IP is blocked. Such a ban shouldn't last very long (only a few days at most). You would have to contact Mozilla via IRC or email to check this out.
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Question owner

Fred McD, I tried those steps but the issue remained.

cor-el, you were heading the the right direction. I had a hunch that something was being blocked but just wasn't sure which direction to look deeper into. Earlier today I finally ran across a post in the comment section from Rapid Web Services SSL store's Hashed Out blog. The article was titled, "Troubleshoot Firefox’s “Performing TLS Handshake Message" https://www.thesslstore.com/blog/troubleshoot-firefoxs-tls-handshake-message/ The problem was my Killer Network Control Center application that was forced on me by MSI motherboards when I purchased a new PC. I did a clean uninstall using their uninstaller from Killer's website. I did not reinstall their basic drivers since I only run a hardwired connection.

Fred McD, I tried those steps but the issue remained. cor-el, you were heading the the right direction. I had a hunch that something was being blocked but just wasn't sure which direction to look deeper into. Earlier today I finally ran across a post in the comment section from Rapid Web Services SSL store's Hashed Out blog. The article was titled, "Troubleshoot Firefox’s “Performing TLS Handshake Message" https://www.thesslstore.com/blog/troubleshoot-firefoxs-tls-handshake-message/ The problem was my Killer Network Control Center application that was forced on me by MSI motherboards when I purchased a new PC. I did a clean uninstall using their uninstaller from Killer's website. I did not reinstall their basic drivers since I only run a hardwired connection.
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FredMcD
  • Top 10 Contributor
4224 solutions 58969 answers

Chosen Solution

That was very good work. Well done. Please flag your last post as Solved Problem as this could help others with similar problems.

That was very good work. Well done. Please flag your last post as '''Solved Problem''' as this could help others with similar problems.
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