There are 176 certs in Firefox https://wiki.mozilla.org/CA:IncludedCAs https://wiki.mozilla.org/CA:IncludedCAs So you could just count them, that would be a s

There are 176 certs in Firefox https://wiki.mozilla.org/CA:IncludedCAs https://wiki.mozilla.org/CA:IncludedCAs So you could just count them, that would be a start :) direct link to Google spreadsheet : https://docs.google.com/spreadsheet/ccc?key=0Ah-tHXMAwqU3dGx0cGFObG9QM192NFM4UWNBMlBaekE&usp=sharing#gid=0 https://docs.google.com/spreadsheet/ccc?key=0Ah-tHXMAwqU3dGx... EDIT: I tried it myself, exporting all the X509.crts from FF36.0 and got 253 ! sigh