Now this is wild. As far as I can tell, FF's default pop-up blocker does not block pop-up windows caused by a mouse click. However, if one uses keyboard shortcuts (alt-b, f) to activate the Furl It javascript, FF blocks it. You have to do alt-b,down arrow to "Furl It", and hit Enter to get around the blocker.

Also, it seems that at times a word or two of text in a textbox will get highlighted and won't unhighlight unless all text is selected and then deselected.

I ought to see if these are known issues with Firefox. They almost surely are. I can't imagine my setup is all that original.