URLs for OCSP are only seen in Firefox playback in the Dynatrace Recorder. They are not filtered during playback. This is an expected behavior related to native Firefox support for OCSP.
Internet Explorer supports OCSP in the Windows operating system, so these URLs do not appear in the IE playback agent.
To disable OCSP support in the Firefox Agent at runtime, add a Custom action with the following code.
Set the target window to
var prefs = Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefBranch);
For more info on OCSP, see http://en.wikipedia.org/wiki/Online_Certificate_Status_Protocol.