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Firefox crashes

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when stream video adobe plug in crashes

when stream video adobe plug in crashes

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If you haven't already, try disabling the new protected mode in Flash 11.3, since that feature is currently being debugged. See this support article from Adobe under the heading "Last Resort": Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?

Firefox support articles on Flash 11.3:

Flash 11.4 beta 2 download page if you want to try it: Adobe Flash Player 11.4 Beta for Desktops - Adobe Labs (I haven't tried it myself)