Jon's post refers to Flash's presence in Safari, and you've apparently described procedures that are native to Firefox.
In my Safari 5.1.10, Flash content automatically begins playing when a page containing it loads...no pop-ups or locks with which to set prefs...presumably why ClickToFlash has been developed.
Edit: CTF allows whitelisting of websites...what I believe jaybass is looking for.
Last edited by artie505; 10/19/15 06:24 AM.