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If the Flash plugin is installed, this Adobe security feature is enabled by default for 32-bit versions of Firefox on Windows. Learn more.

[[T:WindowsOnly]] {for winxp}{note}This article only applies to Firefox on Windows Vista and above.{/note}{/for} {warning}'''Important:''' This article does not apply to the [[How do I tell if I have the 32-bit or 64-bit Firefox?|64-bit version of Firefox]] available for 64-bit operating systems on Windows 7 and above. Mozilla has its own "NPAPI plugin sandbox" security feature for 64-bit Firefox, which is enabled by default.{/warning} ''[http://blogs.adobe.com/security/2012/06/inside-flash-player-protected-mode-for-firefox.html Flash protected mode]'' is a security feature implemented by Adobe in 32-bit versions of Firefox for Windows operating systems, [http://helpx.adobe.com/flash-player.html when the Flash plugin is installed]. 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. You can turn off Flash protected mode by following these steps: #Click on the menu button {for not fx57}[[Image:New Fx Menu]]{/for}{for fx57}[[Image:Fx57menu]]{/for}, 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''. #;{for not fx55}[[Image:flash protected mode fx38]]{/for}{for fx55}[[Image:Fx55FlashProtectedMode]]{/for} # Click the menu button {for not fx57}[[Image:New Fx Menu]]{/for}{for fx57}[[Image:Fx57menu]]{/for} and then click Exit {for not fx57}[[Image:Close 29]]{/for} to close Firefox completely, so that the change can take effect. When you reopen Firefox, Flash protected mode will be disabled. {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}