Bug 1486165 - disable browser_connection_dnsoverhttps.js for frequent failures. r=jmaher

--HG--
extra : rebase_source : 40539a5092e203c690a5dbee8129e773bdc1441c

browser/components/preferences/in-content/tests/browser.ini

@@ -43,6 +43,7 @@ skip-if = os != "win" # Windows-specific handler application selection dialog
 [browser_connection_bug1445991.js]
 skip-if = (verify && debug && (os == 'linux' || os == 'mac'))
 [browser_connection_dnsoverhttps.js]
+skip-if = ccov # Skipping test on all ccov platforms
 [browser_contentblocking.js]
 [browser_cookies_exceptions.js]
 [browser_defaultbrowser_alwayscheck.js]