We are running Moodle 2.5.1 (Build: 20130815) and are experiencing issues with External Tool links opening in firefox. An external tool with parameters to open a URL on one of our media servers works fine in Chrome and IE - the new window is launched and the content from the desired URL is visible. In firefox however the new window is opened and the URL appears but the content of the page is completely blank.
Has anyone else experienced and resolved a similar issue?