> IE: I just want to be able to say "Hey, Firefox... those permissions that I granted to plugins x, y, and z? They don't apply to www.myfavoritebank.example.com"

> Is there a browser that has that feature yet? I spent a few hours trying to figure out if Firefox did. It did not appear to.

Safari has the ability to enable/disable extension on a per-site basis... Even on a "ask every time" basis. Thankfully the ask shows up as a lock badge on the extension's icon rather than a popup.