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How Do I Fix Flash Crashes in FireFox® 13

June 21, 2012  |  Difficulty: Medium

how to fix Flash 11.3 Protected Mode issue in Firefox® 13

Firefox® 13 is the latest version of Mozilla’s® popular Internet browser. People using it typically update the software to get its new features. Unfortunately, this version brought us an unpleasant crash issue connected with Flash Player. More accurately, when you update FireFox® 13 with Flash 11.3 on your Windows® Vista®/7 computer, you may encounter the Flash 11.3 Protected Mode problem. In the instructions below you can read about how to fix this issue and prevent unpleasant Flash Player crashes.

Fixing Flash 11.3 Protected Mode Issue in FireFox® 13 Instructions:

  1. Open “Computer / My Computer” and go to Flash folder:
    For Windows 32bit Users: C:\windows\system32\macromed\flash
    For Windows 64bit Users: C:\windows\syswow64\macromed\flash
  2. Find and open the “mms.cfg” file in a text editor.
    Note: If there is no mms.cfg file, you will need to create one.
  3. Add the following command to the file:
    “ProtectedMode = 0”
  4. Save the “mms.cfg” file and close it.


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