I just installed Firefox 4.0 onto a newer notebook PC. It doesn't behave the same as Firefox 3.6.16 on my older notebook PC. I use Google mail a lot. On my old machine, whenever I am composing an email all I have to do is drag and drop a file's icon and that file becomes an attachment to the email that I am composing. This is a *** GREAT *** feature !!! When I drag the icon over the composing window, a green stripe appears just below the To: information, and I drop the icon anywhere within that stripe. If there was anything I had to do to setup that feature, I sure don't remember what it was. On 4.0 on my new machine, no green stripe appears and dropping doesn't work. On the same Gmail account on my old machine, drag and drop still works. Can anyone help? gary