Firefox security hole
Mozilla says there is a severe security issue in Firefox that will be patched soon:
An attacker can use this vulnerability to collect session information, including session cookies and session history. Firefox is not vulnerable by default. Only users that have installed “flat†packed add-ons are at risk.
Here is a list of Firefox add-ons that are affected. Be sure to install the Firefox update that is expected shortly.
Via ZDnet Zero Day.