Red Hat Security Advisory 2014-1635-01 – Mozilla Firefox is an open source web browser. XULRunner provides the XUL Runtime environment for Mozilla Firefox. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox. A flaw was found in the Alarm API, which allows applications to schedule actions to be run in the future. A malicious web application could use this flaw to bypass cross-origin restrictions.