If you ever wondered what your browser tells the world in terms of your supported SSL/TLS cipher suites, key sizes and plug-in versions, try the first four URLs below in each web browser that you use. If you have a website, the bottom three check your site certificate.

For your Browsers:

Qualys Vulnerable Plug-in Browser Check
https://browsercheck.qualys.com/?scan_type=js

Mozilla Vulnerable Plug-in Check for Firefox, Opera, and Chrome. I believe the Qualys checker above is a little better but it doesn’t hurt to run both Qualys and Mozilla’s just in case one misses something. Also, the Qualys check doesn’t always capture the latest micro point release from Firefox.
http://www.mozilla.org/en-US/plugincheck/

SSL Cipher Suite Details of your Browser
https://cc.dcsec.uni-hannover.de/

SSL/TLS Details of your Browser and POODLE Test
https://www.ssllabs.com/ssltest/viewMyClient.html

For your Website:

Check your Site Certificate or CSR
https://ssltools.websecurity.symantec.com/checker/

Qualys SSl Labs Site checker
https://www.ssllabs.com/ssltest/index.html

SSL Site Configuration Checker
https://sslcheck.globalsign.com/en_US