So... um... Flash is dead.
Yes, assuming a user has installed the plugin Flash should show on a browser. Well, maybe. iThings will never -- ever -- display Flash. I don't have an Android device, but my understanding is that users must jump through a bunch of hoops to make Flash work. Most of those users won't.
This is the beginning of the end. Move on to something else. Look up Google's Swiffy for converting existing Flash files and objects to HTML5. It seems to come with some overhead (byte-wise) over Flash, at least in a couple of my brief experiments. And some things don't quite display as they do in Flash. I had a faded background image in one Flash file that turned out not faded after a Swiffy conversion.