I don't know when the problem started but it has been many versions of both Firefox and Adobe Flash since Flash has worked reliably and quickly. I have tried many solutions including uninstalling both Firefox and Flash and reinstalling them yet the performance problems continue. When the dialog appears to send a crash report, many times I do. My Firefox is 32.0.1 and the Flash plug-in is 15,0,0,152. Is there an end in sight for this problem? The standard answer is Mozilla pointing the finger at Adobe and Adobe pointing at Mozilla.