Bug 1503843 - Disable browser_subResources.js for M-sw-e10s since it fails there for unknown reasons

toolkit/components/antitracking/test/browser/browser.ini

@@ -45,6 +45,7 @@ skip-if = serviceworker_e10s
 [browser_permissionInPrivateWindows.js]
 skip-if = serviceworker_e10s
 [browser_subResources.js]
+skip-if = serviceworker_e10s
 support-files = subResources.sjs
 [browser_script.js]
 support-files = tracker.js