Bug 1622698 - disable browser_aboutHomeLoading.js on Linux_64_opt for frequent failures. r=intermittent-reviewers,MasterWayZ DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D138616

browser/components/urlbar/tests/browser/browser.ini

@@ -29,6 +29,7 @@ support-files =
 [browser_aboutHomeLoading.js]
 skip-if =
   tsan # Intermittently times out, see 1622698 (frequent on TSan).
+  os == 'linux' && bits == 64 && !debug # Bug 1622698
 [browser_action_searchengine.js]
 [browser_action_searchengine_alias.js]
 [browser_autocomplete_a11y_label.js]