kcalw:
I am not sure what flash version I have now. It is what ever is installed buy using the "urgent flash update" I believe it ended with 265.
Unfortunately, 11.4 seems to have freeze issues with Firefox, too.
For use with Firefox, go to www.adobe.com, try this link to version 10.3, unzip it, run the uninstall program, then install that version.
Be sure to deselect automatic update of Flash!