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Enable SSL to fix the Firefox cannot connect securely error message

Starting in Firefox 34, Secure Sockets Layer version 3.0 (SSLv3) is blocked by default because it is no longer secure (for details, see this blog post).
Warning! Your version of Firefox uses Secure Sockets Layer 3.0 (SSLv3) which is no longer safe (for details, see this blog post). To stay safe online and protect your information you should update Firefox to the latest version.

Websites that use the Secure Sockets Layer protocol (SSL) such as banking sites and online stores will have "https" at the start of their address. If Firefox can't access a secure site, it will show an error page saying:

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.

Check your SSL settings

  1. Click the menu button New Fx Menu 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.
  5. Close the about:preferences page. Any changes you've made will automatically be saved.
  1. In the address bar, type about:config and press EnterReturn.

    • The about:config "This might void your warranty!" warning page may appear. Click I'll be careful, I promise!I accept the risk! to continue to the about:config page.
  2. Type security.enable in the Search field.
    • If both security.enable_ssl3 and security.enable_tls are set to true, skip to the next section.
    • If both security.enable_ssl3 and security.enable_tls are set to false, double-click each of them to set it to true.

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 and choose Options.Preferences.
  2. Select the Advanced panel.
  3. Click the Network tab.
  4. Click Settings….
    • 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.
  5. Make any changes, and click OK to close the Connection Settings window.
  6. 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)

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Comments

For past discussion involving this article, see:

Starting in Firefox 3.0, the message is included under the Troubleshoot the "Secure Connection Failed" error message error and reads: Can't connect securely because the SSL protocol has been disabled.

See:

We need to update the article because

  • security.tls.version.min

and

  • security.tls.version.max

replace the deprecated security.enable_ssl3 and security.enable_tls boolean settings.

we forgot to do 4 version before !!

http://kb.mozillazine.org/Security.tls.version.*


thank you

SSL not exist anymore, probably a note that the article fit olders versions(before 34) is better idea ?

I'll add this to the Need Changes list and to the Firefox 34 updates needed thread in the KB articles forum.

From a related blog post, https://blog.mozilla.org/security/2014/10/14/the-poodle-attack-and-the-end-of-ssl-3-0/ SSLv3 will be disabled by default in Firefox 34,

Tyler Downer also said, We've disabled SSLv3 by default in the Firefox 34 Release / Issues / Status thread.

I replaced the content of this article with note for fx34 and I added a warning to the top of this article for fx33 and below (needs review).

https://support.mozilla.org/en-US/questions/1083762#answer-782254

These troubleshooting steps might need to be added for this particular error? ssl_error_inappropriate_fallback_alert

We no longer support Firefox <34 so this can be archived now.

Marko said

We no longer support Firefox <34 so this can be archived now.

Done.