Bug 1407437 - disable test_ev_certificate.py for perma failing for reasons outside of the tree. r=me, a=test-only

testing/firefox-ui/tests/functional/security/manifest.ini

@@ -5,6 +5,7 @@ tags = remote
 [test_enable_privilege.py]
 tags = local
 [test_ev_certificate.py]
+skip-if = true # Bug 1407437
 [test_mixed_content_page.py]
 [test_mixed_script_content_blocking.py]
 [test_no_certificate.py]