Bug 1466043 - disable browser_extension_update_background_noprompt.js on win and linux for frequent failures r=jmaher

browser/base/content/test/webextensions/browser.ini

@@ -20,7 +20,7 @@ support-files =
 [browser_extension_sideloading.js]
 [browser_extension_update_background.js]
 [browser_extension_update_background_noprompt.js]
-skip-if = (verify && debug && (os == 'mac'))
+skip-if = (verify && debug && (os == 'mac')) || (os == 'win') || (os == 'linux') # Bug 1466043
 [browser_permissions_dismiss.js]
 [browser_permissions_installTrigger.js]
 [browser_permissions_local_file.js]