Mozilla has released security updates for the Mozilla Suite, Firefox & Thunderbird, as per this post on Mozillazine. This is not a new feature release, only a security bug fix. These bugs, the oldest of which is only just more than a month old, have all been fixed by this patch. Just over a month in the wild and Mozilla has pluged all the known security holes (actually, only one is more than a month old, the rest are only a few weeks).
There’s a certain other browser/email development team who could learn from this.
