Multiple unspecified vulnerabilities in Fenrir Inc. ActiveGeckoBrowser 1.0.0 and 1.0.5 alpha, a module for the Sleipnir web browser, allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors related to the Gecko engine.
https://exchange.xforce.ibmcloud.com/vulnerabilities/59493
http://www.fenrir.co.jp/blog/2010/06/activegeckobrowser.html