Salesforce Useful JSP pages

• Display request headers that Salesforce receives (does not require login)
  https://login.salesforce.com/smth.jsp
• Client speed / performance test (requires login)
  /speedtest.jsp
• List of trusted certificate authorities:
  /cacerts.jsp
  (works with your instance, such as https://na21.my.salesforce.com/cacerts.jsp)