Mozilla blocked the Framework Assistant last Friday. Earlier in the week, Microsoft warned that Firefox users were vulnerable to an attack because of a problem in the add-on if users had not applied the MS09-054 IE patch. Mozilla consulted Microsoft before implementing the block.

Still blocked is the Windows Presentation Foundation (WPF) add-on, but Mozilla is working on an alternative for users.

“We’re hard at work on improving the experience for (especially enterprise) users who wish to override the blocking of the WPF plugin before we remove it from the blocklist, and I’m working on a post to clarify the events of the past few days,” Shaver wrote. “We (especially I) appreciate your patience and support as we work to keep our users safe and comfortable with all the tools at our disposal.”

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