Security Updates for Mozilla Firefox and Thunderbird

Yet another update for Firefox, the open-source web browser. This fixes a security problem with the program’s JavaScript engine. The Mozilla Foundation calls this critical, yet says, “We have no demonstration that this particular crash is exploitable but are issuing this advisory because some crashes of this type have been shown to be exploitable in the past.”

The same flaw exists in Thunderbird, so users should update both programs. The latest version of Firefox and Thunderbird can be downloaded here.