I tried going to this site netalyzr berkeley and it wants to run java. But this could've been any site. I know there's no harm in this one but it's jut an example.
I clicked Run to run the java plugin.
At some point a window came up asking me if i'd allow it through the firewall. I only want to temporarily. So if another java plugin wanted to run, I want the window to come up asking me for that one too. Is that possible?