Firefox Community Forum

We have systems on our network that run Mozilla Firefox when accessing a specific URL are able to do so with no issues. Then we have other systems in our network that run Mozilla Firefox when accessing that same URL received the following error:

Secure Connection Failed

An error occurred during a connection to "URL". PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

   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.

Both are running the same version of Firefox. The only difference I have found is the DNS over HTTPS status. On the one that the user is able to access the URL, the DNS over HTTPS status is off. On the one that the user is unable to access the same URL, the DNS over HTTPS status is Active using the provider Cloudflare.

These are both brand new install of Firefox and there was no configuration changes. We don't use any GPO's or anything else to manage Firefox. Why would one be off and the other active? This is causing issues.

Going to maps.google.com, results in:

Secure Connection Failed

An error occurred during a connection to google.com. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

   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.

Trying to update my espn+ account and all I get is Secure Connection Failed. I've tried turning off my VPN. ESPN instructs me to go here. Please don't tell me to go to ESPN. I've been all over the renewal page and I keep getting the same Failed response.

I cannot get onto to Amazon website as I am getting an the following error:

Secure Connection Failed

An error occurred during a connection to www.amazon.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

facing problem while browsing connection to sssb.punjab.gov.in. PR_CONNECT_RESET_ERROR

Connection not secure

Why am I getting this message: with no way around it?

Secure Connection Failed

An error occurred during a connection to www.amazon.com. PR_END_OF_FILE_ERROR

Error code: PR_END_OF_FILE_ERROR

Examples of webpages I've entered today that receive an error message are https://leafscape.com & Mint Mobile

I have cleared data and cache and the time is correct but I get, Error Code: PR_CONNECT_RESET_ERROR, and will not log in. I have also done a cold, and hot restarts.

Secure Connection Failed

An error occurred during a connection to juv.scoutjcf.com. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

   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.

An error occurred during a connection to portal.esic.gov.in. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

Hmm. We’re having trouble finding that site.

We can’t connect to the server at fzttlwrt.r.us-east-1.awstrack.me.

If you entered the right address, you can:

   Try again later
   Check your network connection
   Check that Firefox has permission to access the web (you might be connected but behind a firewall)

I had opened a support ticket #447010 with Mozella support and they told me that they can not help me, and sent me here. I am "dead in the water" so to speak. It appears that since Firefox downloaded update 153.0(20260715202819) I have had many issues that appear to be getting worse by the day, and now I cannot open or run my email app. I have not wrote down all the errors (sorry) but here are a couple: 431 Request Header Fields too large, the application is having trouble connecting to the server, unable to load the email from Mozella support. After the update (153.0) my bookmarks have moved to somewhere, the sign on for my email app has changed ( use to click on the firefox icon on the bottom tool bar and the sign in box for optonline.net would be there. I understand that sometimes updates (new and improved) make changes to what users have use to for years. Now is have a browser that is not functional and needs to be corrected, I trust you can help and get this sysem usable again, because right now it is not usable. I presume if and when you respond to me issues it will be at this location and not an email. Please help. Thank you

I am unable to watch movies on paramount +. it says unable to load code 111. has something to do with blocking or firewall or I really don;t know. I am 86 yo and have no grandkids close. HELP

NOTE - I am using Firefox on my PC which is working fine. Issue is with my laptop Firefox.

Firefox was working fine, on my laptop and PC, until about 3 days ago. Started getting Tried to download various versions of Firefox. I am using Firefox on my PC with the same exact settings, network, Win 11 and Antivirus as my laptop. Firefox, version 128.6.0esr (64-bit) works fine on my PC, but does NOT on my laptop. I uninstalled FF and reinstalled it, changes Firewall to Windows on the laptop from my AV, NOTHING. Driving me crazy. HELP please.

Message below (on ANY and ALL websites) and screenshots attached.

Secure Connection Failed An error occurred during a connection to amazon.com. PR_CONNECT_RESET_ERROR Error code: PR_CONNECT_RESET_ERROR 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.

Starting on October 18, I've had problems accessing most websites. I get security errors such as:

Secure Connection Failed Error code: SSL_ERROR_RX_RECORD_TOO_LONG

Secure Connection Failed Error code: PR_END_OF_FILE_ERROR

This problem occurs only with Firefox. It doesn't happen with Chrome (which I had to use to post here).

A few sites work, but not many.

I tried reinstalling the latest version of Firefox but that didn't make any difference.

Suggestions? Thanks in advance.

when loading up Google search or try to login to Youtube I get this message Secure Connection Failed

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. What can you do about it?

The issue is most likely with the website, and there is nothing you can do to resolve it. You can notify the website’s administrator about the problem.

Error Code: PR_CONNECT_RESET_ERROR

I cannot visit www.lancastergc.co.uk now after years of accessing it. please help me connect it again without the following error notice:-

Secure Connection Failed

An error occurred during a connection to www.lancastergc.co.uk. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

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