When I try to open the "manage scripts" window with greasemonkey or "manage styles" in stylish, the same thing happens.
I get a window that's been reduced to nothing but the title bar, and only long enough to fit the min/restore/max buttons. When I expand it, it says "page load error" in the title bar and gives me the following information.
I think we all know the error page.Address not found
Firefox can't find the server at c.
The browser could not find the host server for the provided address.
* Did you make a mistake...
Quite frustrating. I can't modify, delete, or add user scripts or user styles.