I tend to find that firefox just freezes whenever a video needs flash. I've found with youtube at least that I can set a preference to use HTML5 and this works much better.

But what about things like stuff, tvnz or any of these sites. They always try forcing flash on me again. And yet if I browse with an ipad I get video sans flash. How can I tell these sites - you know what I don't have flash give me something else?

I'd rather access less sites than put up with flash freezing my entire installation until the crash it.

I'm on Windows, I've tried chrome and while it's pretty I wouldn't want to use it as my daily driver, there are things i'm used to in Firefox that I just prefer (tabs on the bottom, background tab loading etc). I would look at a firefox plugin to send a link to chrome however.