Bug 1369556 - Disable test_toolbars for high intermittence. r=aryx

MozReview-Commit-ID: 8RYlfUoRMM2

--HG--
extra : rebase_source : c1dcf04a32fed77f6d189c375609a608f9bdf036

testing/firefox-ui/tests/puppeteer/manifest.ini

@@ -17,6 +17,7 @@ tags = remote
 [test_page_info_window.py]
 [test_tabbar.py]
 [test_toolbars.py]
+disabled = Bug 1369556
 tags = remote
 [test_update_wizard.py]
 tags = remote