Security researcher kakzz.ng reported that if a javascript: URL is selected from the list of Firefox "new tab" page, the script will inherit the privileges of the privileged "new tab" page. This allows for the execution of locally installed programs if a user can be convinced to save a bookmark of a malicious javascript: URL. External Reference: http://www.mozilla.org/security/announce/2012/mfsa2012-95.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges kakzz.ng as the original reporter. Statement: This issue does not affect the version of firefox as shipped with Red Hat Enterprise Linux 5 and 6