Trailrunner7 writes "Adobe has released a new version of their Flash player that now gives Firefox users the additional security of a sandbox and also includes a background update mechanism for Mac users. Flash has run in a sandbox on Google Chrome and Internet Explorer for some time already. The big security news in Flash player 11.3 is the addition of the protected mode sandbox for Firefox on Windows. That's a major change for Adobe, which has been adding sandbox to its main product lines for a couple of years now. Adobe Reader X has run in protected mode — which is what Adobe calls its sandbox — since its release, and the company also added a sandbox to Flash on Google Chrome. The sandbox is designed to prevent attackers from using vulnerabilities in Flash to break out of the application and move to other apps or the OS itself."