Mms.cfg file is a text file, it is located in the following system directory

We’re assuming, by default when Flash Player installed on your system, it places mms.cfg file and Flash Player uses the settings defined in it to manage its functionality.

“The Protected Mode sandbox could cause compatibility issues with existing Flash content on the web If however, you see a potential problem that may be related to Protected Mode, you can disable Protected Mode with the following setting in your mms.cfg file: įrom the first beta release notes PDF of Flash Player Protected Mode(PM) for Firefox, we came to know that, PM can be disabled by adding a setting “Protected Mode =o” to mms.cfg file. Visit about:config, find and change ‘ .disable-protected-mode‘ preference value to ‘true’ ( if it already showing the same you don’t need to make any change). UPDATE Feb 9, 2015: Instead of below procedure, you can also do this: UPDATE August 25, 2015: Firefox now offers a setting within Flash Options to disable or enable Protected Mode.Ĭlick on Menu > Add-ons > Plugins > click on ‘Options’ for ‘Shockwave Flash’ and uncheck the tick button for the ‘Enable Adobe Flash protected mode’.

Sandboxed Flash Player running in Firefox prevents your system from attacks from malicious SWF files, but, if you’re facing issues with the Flash Player Protected Mode in Mozilla’s browser, you can disable it to troubleshoot those.įlash Player Sandbox for Firefox (Public Beta) Launched by Adobe Disabling Sandboxed Flash Player in Firefox Today we’ve covered that Flash Player 11.3 has been released by Adobe with Protected Mode by default for Firefox.

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