[orca-list] orca responding slow in thunderbird message tree

[Krishnakant Mane <krmane gmail com>]

Hello all,

I wish to know if there is a way to disable the preview window in 
Thunderbird.
I see off late that thunderbird with Orca is responding slow.
I browse the messages using up and down arrow but the response is late.
I feel this is probably due to the way Thunderbird loades message as 
soon as it is selected using arrow.
So even before I hit enter on a message it is getting loaded.
This might be the cause for slow response with Orca.
Is there a way to stop this from happening.
I don't think preview windows is some thing I like using.
I never press f6 to read the message so I find it personally useless.
So please suggest some way.
Happy hacking.
Krishnakant.