Bug 1519868 Disable browser_CTP_iframe.js on Windows opt and pgo builds. r=aryx

Differential Revision: https://phabricator.services.mozilla.com/D19768

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

browser/base/content/test/plugins/browser.ini

@@ -63,6 +63,7 @@ tags = blocklist
 [browser_CTP_hide_overlay.js]
 tags = blocklist
 [browser_CTP_iframe.js]
+skip-if = os == 'win' && !debug # Bug 1519868
 tags = blocklist
 [browser_CTP_nonplugins.js]
 skip-if = verify