Huge problems with Flash Player 13.0.0.214 memory usage & leaks

After I've used flash player for awhile (different streaming videos), it uses more and more memory or just crashes.  This seems worse the longer I've been using it, and the longer I've had firefox (v 27) open.  Turning off hardware acceleration in either flash or firefox (or both) seems to make no difference.  It often gets up to over 200 mb memory usage - and when it gets over roughly 150 the video stream becomes hesitant/jerky - the worst I've seen was a few minutes ago it was over 1,000 mb.  I used task manager to close it, and it relaunched itself and was very shortly over 900 mb.  So I closed and re-opened firefox.  It's only been reopened for a few minutes, and I only have one streaming video loading (not even playing), and it's already over 800mb again.  In the time it took to type this, it's climbed over 1,000 again.  I've also noticed that task manager often shows not only 13.0.0.214, but also flash player 11.x.x.x (I can't recall the rest of the version number although there is an 8 in it, and it's not showing right now).  When I look under control panel programs, however, the only flash player shown in 13.0.0.214. 

Please help, this is extremely frustrating.

I'm on Windows 7 home premium, on an 64 bit system, Asus laptop with 4GB ram, using Firefox 27.0.