How to Fix the SSL_ERROR_RX_RECORD_TOO_LONG Error in Firefox [MiniTool Tips]

The SSL_ERROR_RX_RECORD_TOO_LONG error message from Firefox is caused by the misconfiguration on the server-side. Now, I will provide more details about the reasons.

1. You have got the listening port misconfigured – If you want your website to establish secure connections, you must configure it to use Port 443.

2. You don’t support an adequate TLS version – This problem arose ten years ago with the advent of TLS 1.2 and is appearing again with TLS 1.3.

Also see: What Is TLS and How to Enable It on Windows Server?

Then, let’s take a look at the methods to fix the SSL_ERROR_RX_RECORD_TOO_LONG error message.

Method 1: Switch to HTTP

An accelerated way to access a website blocked by the pesky "Secure Connection Failed" message is to replace https:// with http:// at the beginning of the URL. Since this method has proved useful to many people, you can have a try.

Method 2: Remove Firefox’s Add-ons

Although add-ons usually come in pretty helpful, they are often reported to cause multiple connection issues including the error code: SSL_ERROR_RX_RECORD_TOO_LONG. Thus, you need to try disabling add-ons in Firefox. Here is how to do that:

Step 1: Navigate to the Firefox URL bar. Type about:addons and press the Enter key.

Step 2: Locate your add-ons and click the Disable button next to them.

Step 3: Finally, restart your browser and see if the issue has been fixed.

Also see: Firefox Not Responding? Here Are 4 Effective Fixes for You

Method 3: Check Your Proxy Settings

If you are using a proxy, make your proxy settings are correct. The SSL_ERROR_RX_RECORD_TOO_LONG Firefox error can be caused by incorrect proxy settings. It’s recommended to check them and you can follow the steps below.

Step 1: You can press the Windows + S keys at the same time to open the Search box.

Step 2: Click the best match Internet Options from the search result.

Step 3: Then go to the Connection tab and click LAN settings.

Step 4: Under the Proxy server category, uncheck the Use a proxy server for your LAN box. Then make sure the Automatically detect settings box is checked.

Step 5: Then click OK to save the change. Then, check to see if the error still persists.

Method 4: Disable Firefox’s Proxy

If the SSL_ERROR_RX_RECORD_TOO_LONG error still exists, the chances are your proxy connection is the culprit. Thus, you can try to disable it. Here are the instructions.

Step 1: Open the menu icon and select Options. Go to the Network Proxy section.

Step 2: Select Settings. Go to the Configure Proxy access to the Internet section and select the No proxy option.

Step 3: Press OK and restart your browser.

Method 5: Update Firefox

The last method for you is to update the Firefox browser. The steps are as follows:

Step 1: Launch your Firefox browser. Go to the top right corner to click the menu icon.

Step 2: Click Help and select About Firefox. You will be taken to the Firefox version screen. Your browser will be updated automatically if need be.

Step 3: Restart the browser and check if the has been fixed after updating Firefox.

Final Words

To sum up, you can know how to fix the SSL_ERROR_RX_RECORD_TOO_LONG error on Firefox. If you encounter the same issue, you can try the methods above to get rid of it.