Enable SSL to fix the Firefox cannot connect securely error message

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  • Creator: Michael Verdi
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  • Reviewed by: Verdi
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Secure Sockets Layer (SSL) lets you securely access websites. Websites that use SSL will have "https" at the start of their address. Most banking sites and online stores use SSL.

If Firefox can't access a secure site, it will show an error page saying:

Secure Connection Failed

An error occurred during a connection to (site name). Can't connect securely because the SSL protocol has been disabled.

(Error code: ssl_error_ssl_disabled)

This article will describe how to enable SSL in Firefox if you get this message.

If you additionally receive the message "Could not initialize the browser's security component", see Fix the "Could not initialize the application's security component" error message.

For any other errors, see Websites don't load - troubleshoot and fix error messages.


Check your SSL settings

  1. Click the menu button New Fx Menu Fx57Menu and choose Options.Preferences.
  2. Select the Advanced panel.
  3. Click the Encryption tab.
  4. Verify that Use SSL 3.0 and Use TLS 1.0 are check marked.
    • If both boxes are check marked, this section does not apply. You can skip to the next section.
    • If both Use SSL 3.0 and Use TLS 1.0 are not check marked, check mark both of them.
  1. Close the about:preferences page. Any changes you've made will automatically be saved.

Try to access a secure site again. If it still doesn't work, continue in the next section.


Check your proxy settings

Some computers are configured to access the Internet through a proxy.

  1. Click the menu button New Fx Menu Fx57Menu and choose Options.Preferences.
  2. Select the Advanced panel.
  3. Click the Network tab.
  4. Click Settings....
  5. If Manual proxy configuration is selected, you are using a manually configured proxy server. Verify that all protocols listed in the dialog box are pointing to the address of your proxy server. Contact your network administrator if you don't know this address.
    • If Manual proxy configuration is not selected, this section does not apply. You can skip to the next section.
  1. Make any changes, and click OK to close the Connection Settings window.
  2. Close the about:preferences page. Any changes you've made will automatically be saved.

Try to access a secure site again. If it still doesn't work, continue in the next section.


Security software

To use SSL protocol, Firefox needs to make a connection to itself. Some security software can block this connection. For information on how to configure security software to allow Firefox the access it needs, see Configure firewalls so that Firefox can access the Internet.


Problem with a specific site

You can test your browser for SSL functionality. If your browser passes the test, the problem may be specific to the site you're trying to access.




Based on information from SSL is disabled (mozillaZine KB)