Do you have the Personas Plus extension installed? If so, is it enabled?

Yes, it's enabled. In fact, I disabled it, then re-enabled it. And removed and reinstalled it. And repeated the process. Still no little Fox.

I'm running it on a Mac, OS v. 10.5.8, PowerPC.

if people out there has the new FF4 then you might not see the masked fox on bottom left corner. it took me a few minutes to figure it out but i found it. ok if you dont have the status bar on bottom showing 1st thing to do is:

1st--go up top click tab called VIEW 2nd-- click toolbars 3rd-- click add-on bar

then once thats done look at the bottom & u should see a black bar on bottom left. well i was stumped also when i saw this then i then looked right then i saw the fox there. but another way to find the fox (annoying way) is to go up top click tools then personas. but i like the fox & find it much easier. glad i found it again. happy persona-ING..