QuickEdit_link on TS error in Firefox, not in Chrome?

[Plausible]

Hello,

I have the TiddlyTools QuickEdit toolbar installed on my TiddlySpace.
Works fine in general. But when in FF3.6 I try to use the 'link'
button (QuickEdit_link) to insert a link I get an error message:

error during local file access: Error: A script from "http://
MySpaceName.tiddlyspace.com" was denied UniversalXPConnect privileges.

However in Chrome this doesn't happen; things work as intended.

Not sure this is really a FF/Chrome difference - maybe it's just my
settings which are different in each. Any ideas where to look? Thanks,
~P