[tor-talk] stop page image_thumb from appearing in tabs

[Joe Btfsplk]

Must have missed a memo about actual thumbnails (tiny) of pages 
appearing in each tab, in TBB 2.3.25-8.  Not icons - actual thumbs of 
pages.  I don't see that in regular fox, but maybe other addons block 
that behavior.

Do you have to edit an about:config entry to stop them from showing in 
the tabs?  Images are generally too small to be of much use & take up 
room for text.

Thanks.