I did my usual update of Adobe Flash today, and since I now have the Edge beta I decided to update the PPAPI Flash version. It worked, but I discovered that Edge really doesn't like Flash very much.
First, it defaults to disabled. If you visit a Flash page (like, say, the Check Adobe Flash Player Version), nothing works. But there's a tiny icon in the address bar; if you click it, it tells you "Flash was blocked on this page" and gives you the option to "Manage." If you click Manage you can turn Flash on.
Then, you get a nag telling you "Flash will no longer be supported 15 months from now" or words to that effect, with a button to "turn off" Flash again. You can dismiss the nag, (Edit:) but it will come back every time you restart Edge!
Then, if you try again, it still doesn't work! But if you click on a Flash control, at least now it gives you the option to "Allow". (Edit:) And once again, you must redo this every time you restart Edge! Pages you've told Edge to "allow" Flash on are only remembered until you close it.
So does it finally work then? No, of course not! You have to explicitly click on each Flash control again (in this example, the one telling you which Flash version you have) in order to run that control. Google/M$ really don't want you running Flash!
What a ridiculous number of hoops to jump through! In Firefox, I generally leave Flash disabled, but I have an add-on that lets me enable it with one click if I run across a site that needs it.
I think Firefox and its forks (at least, the older ones that still run it) have it about right. I don't want it on by default (as is the case with IE), but if I do want it, I don't expect to have to answer a ton of "are you sure?", "are you really sure?", and "are you ABSOLUTELY, POSITIVELY sure?" dialogs first!