See https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.17_release_notes https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.17.1_release_notes https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.17.2_release_notes For the changes (note that 3.16.2.1 had the same fixes as 3.17.1)