Bug 1575369 - Disable browser_ext_sidebarAction_incognito.js on Mac and Win10. r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D43176

--HG--
extra : moz-landing-system : lando

browser/components/extensions/test/browser/browser-common.ini

@@ -173,6 +173,7 @@ skip-if = debug # Bug 1394984 disable debug builds on all platforms
 [browser_ext_sidebarAction_context.js]
 [browser_ext_sidebarAction_contextMenu.js]
 [browser_ext_sidebarAction_incognito.js]
+skip-if = (os == "win" && os_version == "10.0") || ('mac' && os_version == '10.14' && debug) # Bug 1575369
 [browser_ext_sidebarAction_runtime.js]
 [browser_ext_sidebarAction_tabs.js]
 [browser_ext_sidebarAction_windows.js]