[omh]

As a corporate sysadmin, I should say that the Chrome method is much better than the Firefox one.

We often have slightly out of date plugins, simply because it takes a while to get new versions tested and rolled out. When Firefox blocks them it breaks functionality and can cause a few awkward problems. Generally that just means that the user will use IE instead, so the protection is lost.

[justinschuh]

I wasn't aware the blocking worked that way in Firefox. We considered going that route as well, but in our testing the optional block was nearly as effective as fully disabling.