How to make Firefox browser safe from Logjam Attack

Firefox is vulnerable to Logjam, here’s how to make it safe. Currently only Internet Explorer 11 is safe from logjam attacks (to a surprise! Microsoft patched their browser earlier than others), other browsers like Chrome, Firefox, Safari and others are vulnerable. Google and Mozilla will fix this soon with future releases, but you don’t have to wait until then for Mozilla’s Firefox browser.

Note: It looks like the Windows Chrome dev and Canary channels are already protected against this.

READ: Firefox leads list of vulnerabilities, Safari follows

Securing Firefox Browser Against Logjam

1 . Visit about:config

2. Search for ‘ssl3’ and disable the DHE_EXPORT ciphers by setting the preference values ​​below to false.

  • security.ssl3.dhe_rsa_aes_128_sha
  • security.ssl3.dhe_rsa_aes_256_sha

3. Restart the browser, visit website, which should show the message ‘Good news! Your browser is safe from logjam’s attack.

If you found it difficult to change about:config preferences, install Disable DHE add-on.

We expect Mozilla to ship Firefox 39 final by disabling the above preferences.

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