--- a/testing/firefox-ui/tests/functional/security/manifest.ini
+++ b/testing/firefox-ui/tests/functional/security/manifest.ini
@@ -5,16 +5,17 @@ tags = remote
 [test_enable_privilege.py]
 tags = local
 [test_ev_certificate.py]
 [test_mixed_content_page.py]
 [test_mixed_script_content_blocking.py]
 [test_no_certificate.py]
 tags = local
 [test_safe_browsing_initial_download.py]
+disabled = Bug 1292728 - Permafail due regression from bug 1258041
 [test_safe_browsing_notification.py]
 [test_safe_browsing_warning_pages.py]
 [test_security_notification.py]
 [test_ssl_disabled_error_page.py]
 [test_ssl_status_after_restart.py]
 skip-if = (os == "win" && os_version == "5.1") # Bug 1167179: Fails to open popups after restart
 [test_submit_unencrypted_info_warning.py]
 [test_unknown_issuer.py]