[orca-list] Orca slows down the Navigation Bundle extension of Firefox

[Hermann <meinelisten onlinehome de>]

Hi,
because I've tested the screen reader SUE today, I discovered why the 
Navigation Bundle extension of FF, provided by Rich Caloggero, behaves 
slow:
It seems to be an Orca issue: When I use FF with Orca and start the links 
list by pressing control+shift+l, I have to wait at least a minute till it 
starts.
I did the same with SUE and it comes up almost immediately - tested on the 
same site of course.
So I think it's obvious that Orca must cause this sluggishness; till today 
I put the blame on the Navigation Bundle, which is wrong.
Sighted or low visioned users can do the test by starting the links list 
with and without Orca.
Can anyone confirm my observations?
Hermann