For quite some time I've been using Firefox, Chrome, and Internet Explorer (preference in that order). Lately, Firefox's memory leaks and crash behaviour have been pushing me away. When Firefox crashes it kills all my tabs. On the other hand, I've found that when Chrome crashes (rarely) it only kills the tab that crashed it. Of course, I've been moving toward Chrome more and more.
So now I've been trying to live without Flash Player...
It turns out that of those browsers, only Chrome supports HTML 5 video well enough for most videos on Youtube. What this means is that as long as I use Chrome to go to Youtube, I can watch videos without Flash Player.
I consider this a success, so far.