Chrome comes with its own Flash build preinstalled and runs one instance of flash per tab. If I was a betting man, I'd say Chrome is your problem. I'd get rid of it. Heck I'd get rid of it for ethical reasons.
Unless you're running Windows where the default broswer is IE (which does indeed suck), I don't see why so many people insist on using an alternate browser.
I've just disabled chromes flash. I don't see why everyone wants me to switch from Chrome to Safari. Firefox runs like crap for me, it used to be my main browser until I found that Chrome ran better. Opera is, well Opera. I just don't like Safari. I've given it plenty time in the past and I just straight up highly dislike it.