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An error occurred during a connection to support.mozilla.org. Cannot communicate securely with peer: no common encryption algorithm(s). (Error code: ssl_error

  • 6 replies
  • 20 have this problem
  • 611 views
  • Last reply by cor-el

I already tried opening about:config and do not have "security.tls.version.fallback-limit = 1" listed, as some of the other threads suggest. I am on an older Mac running 10.6.8 and almost every website I attempt to go to gives me this message: "An error occurred during a connection to support.mozilla.org. Cannot communicate securely with peer: no common encryption algorithm(s). (Error code: ssl_error_no_cypher_overlap)"

I appreciate any help in solving this. Thanks.

I already tried opening about:config and do not have "security.tls.version.fallback-limit = 1" listed, as some of the other threads suggest. I am on an older Mac running 10.6.8 and almost every website I attempt to go to gives me this message: "An error occurred during a connection to support.mozilla.org. Cannot communicate securely with peer: no common encryption algorithm(s). (Error code: ssl_error_no_cypher_overlap)" I appreciate any help in solving this. Thanks.
Attached screenshots

Chosen solution

What Firefox version are you currently running?

Firefox support has ended for Mac OS X 10.6, 10.7 and 10.8:

Read this answer in context 👍 0

All Replies (6)

It seems likely you are running an old version of Firefox on that mac. It is not advised you run old, out of date and unsupported software to surf the web, as it is insecure and can lead to issues like this.

Chosen Solution

What Firefox version are you currently running?

Firefox support has ended for Mac OS X 10.6, 10.7 and 10.8:

Firefox wont let me update past v 3.6.28. So it wont work at all???

Did you try to install the Firefox 48.0.2 release version or Firefox 45.9.0 ESR like suggested in the article?

If there a problem with updating or with the permissions then best is to download the full version and trash the currently installed Firefox application to do a clean reinstall.

Download a new copy of the Firefox application and save the Disk Image file to the desktop

Best would be probably to create a new profile since your current version is very old. See "Creating a profile":