Luckily, you might read this post fromMiniToolto find some useful methods to fix the annoying issue.

The SSL_ERROR_RX_RECORD_TOO_LONG error alert from Firefox is brought on by the misconfiguration on the server-side.

Now, I will provide more details about the reasons.

SSL_ERROR_RX_RECORD_TOO_LONG

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

Then, lets take a look at the methods to fix the SSL_ERROR_RX_RECORD_TOO_LONG issue notification.

Since this method has proved useful to many people, you’re able to have a try.

click LAN settings

Thus, you better try disabling add-ons in Firefox.

Here is how to do that:

Step 1:Navigate to theFirefox URLbar.

Typeabout:addonsand press theEnterkey.

select the No proxy option

Step 2:Locate your add-ons and click theDisablebutton next to them.

Step 3:Finally, kickstart your web app and see if the issue has been fixed.

Also see:Firefox Not Responding?

The SSL_ERROR_RX_RECORD_TOO_LONG Firefox error can be because of incorrect proxy parameters.

Its recommended to check them and you might follow the steps below.

Step 1:you could press theWindows+Skeys at the same time to open theSearchbox.

Step 2:nudge the best matchInternet Optionsfrom the search result.

Step 3:Then go to theConnectiontab and clickLAN options.

Step 4:Under theProxy servercategory, uncheck theUse a proxy server for your LANbox.

Then verify theAutomatically detect settingsbox is checked.

Step 5:Then clickOKto save the change.

Then, check to see if the error still persists.

Thus, you might attempt to disable it.

Here are the instructions.

Step 1:Open themenuicon and selectOptions.

Go to theNetwork Proxysection.

Step 2:SelectSettings.

Go to theConfigure Proxy access to the Internetsection and select theNo proxyoption.

Step 3:PressOKand kickstart your net net app.

Method 5: Update Firefox

The last method for you is to update the Firefox web client.

The steps are as follows:

Step 1:Launch your Firefox online window.

Go to the top right corner to click themenuicon.

Step 2:ClickHelpand selectAbout Firefox.

You will be taken to theFirefox versionscreen.

Your web app will be updated automatically if need be.

Step 3:Restart the web app and see if the has been fixed after updating Firefox.