Firefox 25 on Windows 7: Flash 11.9.900.117 freezes Firefox

[Guest]

I have done the troubleshooting suggested by Mozilla https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding

Firefox works fine but as soon as any Flash content is started Firefox locks up and I have to close the process in Windows Task Manager.

I can't go into Flash settings and disable hardware acceleration because Flash freezes Firefox completely before that.

[chris.campbell · Accepted solution]

Could you try disabling hardware acceleration via your system's mms.cfg file?

This will be located in your C:\windows\syswow64\macromed\flash folder (assuming that you are using a 64 bit version of Windows).  Simply open up the mms.cfg file with a text editor and add the following line:

DisableHardwareAcceleration=1

Save the file and try again.

If that fails, I'd recommend reverting back to Flash Player 11.7 until this can be resolved.

Where can I find direct downloads of Flash Player 11.7 for Windows or Macintosh?

[Guest]

That worked. The freeze is gone. Thanks!

[jmz215]

This didn't work for me. I had no file named "mms.cfg" in my C:\windows\syswow64\macromed\flash folder. I created one and added the entry, but it didn't seem to work after I rebooted the system. I confirmed by going into the settings and it was still enabled.

Any suggestsions?

[jmz215]

Nothing? You don't know or you don't want to help?

Just asking because it seems there have been a few of these questions which have gone unupdated.