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Flash protected mode is an Adobe security feature on Windows Vista/7/8 or above. Disable it in Firefox if the Flash plugin crashes or hangs.

{for winxp,mac,linux}{warning}This article applies to Windows Vista/7/8 or above.{/warning}{/for} {for fx42}{warning}'''Important:''' This article does not apply to the new 64-bit Firefox for Windows 64-bit operating systems. Mozilla has its own "NPAPI plugin sandbox" security feature, which is enabled by default on Windows 64-bit Firefox.{/warning}{/for} ''[http://blogs.adobe.com/security/2012/06/inside-flash-player-protected-mode-for-firefox.html Flash protected mode]'' is a security feature for Firefox which is implemented by Adobe for Windows operating systems (Windows Vista/7/8 or above). This feature is enabled by default, to make it difficult for attackers to access your computer. ''Flash protected mode'' might cause Flash performance problems in Firefox, such as persistent hangs or plugin crashes. This is especially true for users on Windows touchscreen devices and for users who use accessibility tools. {for not fx35} To disable Flash protected mode, see Adobe's instructions under the heading "Last Resort": [http://forums.adobe.com/message/4468493#TemporaryWorkaround Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?] {/for} {for =fx35,=fx36,=fx37,win7} You can turn off Flash protected mode by following these steps: #[[T:aboutconfig]] #Search for {pref dom.ipc.plugins.flash.disable-protected-mode} in the list of preferences. #Double-click on the preference to toggle its value from {pref false} to {pref '''true'''}. #Click the menu button [[Image:New Fx Menu]] and then click Exit [[Image:Close 29]] to completely close Firefox, so that the change can take effect. #Restart Firefox. {/for} {for =fx35,win8,win10} To disable Flash protected mode, see Adobe's instructions under the heading "Last Resort": [http://forums.adobe.com/message/4468493#TemporaryWorkaround Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?] {/for} {for =fx36,=fx37,win8,win10} You can turn off Flash protected mode by following these steps: #[[T:aboutconfig]] #Search for {pref dom.ipc.plugins.flash.disable-protected-mode} in the list of preferences. #Double-click on the preference to toggle its value from {pref false} to {pref '''true'''}. #Click the menu button [[Image:New Fx Menu]] and then click Exit [[Image:Close 29]] to completely close Firefox, so that the change can take effect. #Restart Firefox. {/for} {for fx38} You can turn off Flash protected mode by following these steps: #Click on the menu button [[Image:new fx menu]], followed by {menu Add-ons}. #Click on the ''Plugins'' panel and select {button Options} next to ''Shockwave Flash''. #Remove the check mark next to ''Enable Adobe Flash protected mode''. #;[[Image:flash protected mode fx38]] # Click the menu button [[Image:New Fx Menu]] and then click {for win,linux}Exit{/for}{for mac}Quit{/for} [[Image:Close 29]] to close Firefox completely, so that the change can take effect. When you reopen Firefox, Flash protected mode will be disabled. {/for} {warning}'''Warning:''' Disabling ''Flash protected mode'' makes your computer more vulnerable to security exploits. Do not disable this feature unless you are affected by poor Flash performance.{/warning}