Firefox Fix

If you download the latest version of Firefox (as of this writing it’s version 34), and you connect to certain legacy SSL secured websites, you may receive the error:

Unable to Connect Securely

Firefox cannot guarantee the safety of your data on because it uses SSLv3, a broken security protocol.
Advanced info: ssl_error_no_cypher_overlap

This is the fix:
Firefox now operates over a range of SSL/TLS protocols. These settings are accessed using the about:config preferences editor.Lowest Acceptable Protocol: security.tls.version.min (default SSL3.0 = 0)
Highest Allowed Protocol: security.tls.version.max (default TLS1.0 = 1)

Set both values to “0”

To modify:

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(2) In the Search box above the list, type or paste tls and pause while the list is filtered

(3) To disable SSL3 and requires TLS of one flavor or another, double-click security.tls.version.min and enter the desired value:

  • 0 = SSL 3.0 okay 
  • 1 = at least TLS 1.0
  • 2 = at least TLS 1.1 See WARNING below

(4) To disable TLS of one flavor or another, double-click security.tls.version.max and enter the desired value:

  • 0 = up to SSL 3.0
  • 1 = up to TLS 1.0
  • 2 = up to TLS 1.1 See WARNING below

WARNING: According the following article, selecting TLS 1.1 may prevent connections to older servers from working:*

December 10, 2014 by Lauren Winstead Category: General IT 0 comments

Recent Posts