title: Check for a certificate in the Firefox certificate storage
body: <p>I am looking for a way to programmatically search for all certificates issued by a specific issuer in the firefox certificate storage and show their contents, like 'Username' and other fields on a web browser. All I found while searching the internet was options of how to load certificates into the storage, but not the other way round. Do you have an idea of how to do this? Is there any API out there which can do this?</p>
  
  <p>Thanks in advance!</p>