No I'm not, actually I've never heard of it until now. I do have ad/flash blockers, keeps my browser clean and running quick.
I am not a big fan of add ons in any browser, but am always interested in learning. Do you find it useful?
I don't use many addons either. I just use some security ones like WOT and a few SEO and of course adblock. (Not enabled on DP because Shawn is too awesome.)