{"id":10925,"date":"2025-01-13T05:50:12","date_gmt":"2025-01-13T05:50:12","guid":{"rendered":"https:\/\/outbyte.com\/blog\/?p=10925"},"modified":"2025-08-26T13:48:14","modified_gmt":"2025-08-26T13:48:14","slug":"how-to-fix-the-ssl_error_rx_record_too_long-error-in-firefox","status":"publish","type":"post","link":"https:\/\/outbyte.com\/blog\/how-to-fix-the-ssl_error_rx_record_too_long-error-in-firefox\/","title":{"rendered":"How To Fix the \u201cSSL_ERROR_RX_RECORD_TOO_LONG\u201d Error in Firefox?"},"content":{"rendered":"\n

<\/span>What is the SSL_ERROR_RX_RECORD_TOO_LONG Error?<\/span><\/h2>\n\n\n\n

This error occurs when Firefox can\u2019t verify a secure connection due to data issues. The message usually looks like: \u201cSecure Connection Failed.<\/em> <\/em><\/strong>An error occurred during a connection to xyz.com. SSL received a record that exceeded the maximum permissible length. Error code: SSL_ERROR_RX_RECORD_TOO_LONG.<\/em>\u201d<\/p>\n\n\n\n

It points to a security problem, likely on the server side, that stops you from accessing the site. The issue is with how the server handles SSL\/TLS certificates. Only the website owner can permanently fix it.<\/p>\n\n\n\n

Though this error is specific to Firefox<\/strong>, switching browsers will show a similar error. The root cause is a misconfigured SSL\/TLS certificate on the server. If you\u2019re a website owner, this error means the TLS\/SSL certificate isn\u2019t set up correctly.<\/p>\n\n\n\n

You can check the problem with this OpenSSL command: openssl s_client -connect domain.tld:*port*<\/code>. You should get the following output if the error has been confirmed: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:766:<\/code><\/p>\n\n\n\n

If the handshake fails, it means the SSL certificate isn\u2019t properly configured for the port.<\/p>\n\n\n\n

<\/span>Causes of the SSL_ERROR_RX_RECORD_TOO_LONG Error<\/span><\/h2>\n\n\n\n

The error is generally caused by two main server-side issues:<\/p>\n\n\n\n

    \n
  1. The server isn\u2019t configured to use Port 443<\/strong>, which is necessary for secure connections.<\/li>\n\n\n\n
  2. The server doesn\u2019t support the correct TLS version<\/strong> (TLS 1.2 or higher).<\/li>\n<\/ol>\n\n\n\n

    Most of the time, this error is due to one of these server-side issues, not something on your end. Regular users should avoid making risky changes to their system to bypass the error, as the issue lies with the website\u2019s security.<\/p>\n\n\n\n

    \"Secure<\/figure>\n\n\n\n
    \n

    Read about other Browser Errors:<\/p>\n\n\n\n

    Error Code 224003 in browser<\/a><\/p>\n\n\n\n

    How to Fix ERR_HTTP2_PROTOCOL_ERROR<\/a><\/p>\n\n\n\n

    ERR_CONNECTION_REFUSED Error<\/a><\/p>\n\n\n\n

    Status_Access_Violation Error<\/a><\/p>\n<\/blockquote>\n\n\n\n

    \n\n\n\n

    <\/span>How to Fix SSL_ERROR_RX_RECORD_TOO_LONG Firefox Error<\/span><\/h2>\n\n\n\n

    Before you proceed with the solutions below, make sure to run an optimizer like Outbyte PC Repair<\/a> to get rid of bugs and other issues that might complicate the problem.<\/p>\n\n\n\n

    If you use Mozilla Firefox, here\u2019s how to easily resolve the SSL_ERROR_RX_RECORD_TOO_LONG error and access your website.<\/p>\n\n\n\n

    <\/span>Fix #1: Upgrade TLS Version<\/span><\/h3>\n\n\n\n

    Make sure that your server or browser is running the most recent version of TLS, which is TLS 1.3. If that’s not an option, then at least ensure that TLS 1.2 is enabled. The rest, like TLS 1.0, should be turned off for security reasons.<\/p>\n\n\n\n

    <\/span>Fix #2: Uninstall Firefox Extensions<\/span><\/h3>\n\n\n\n

    Sometimes, an incompatible extension or one that isn’t up to date is causing the problem. To disable them in Firefox, perform the following steps:<\/p>\n\n\n\n