--- a/browser/components/contextualidentity/test/browser/browser.ini
+++ b/browser/components/contextualidentity/test/browser/browser.ini
@@ -3,16 +3,17 @@ support-files =
   empty_file.html
   file_reflect_cookie_into_title.html
   favicon-normal32.png
   file_set_storages.html
   serviceworker.html
   worker.js
 
 [browser_aboutURLs.js]
+skip-if = (os == "linux" || os == "win") && debug # bug 1419943
 [browser_eme.js]
 [browser_favicon.js]
 [browser_forgetaboutsite.js]
 [browser_forgetAPI_cookie_getCookiesWithOriginAttributes.js]
 [browser_restore_getCookiesWithOriginAttributes.js]
 [browser_forgetAPI_EME_forgetThisSite.js]
 [browser_forgetAPI_quota_clearStoragesForPrincipal.js]
 [browser_newtabButton.js]