Rated 5 out of 5 stars
I just noticed the mail link to in the bar; when I try to set up an account, my system hangs up. I use my real e-mail address, right, but I don't use my e-mail password, right?
Some have said that when they go to a page, CoolPreviews doesn't work; this has happened to me, but just click on the icon in the status bar, press user preferences, press save (even though you haven't changed anything) and it works like a charm.
Other great things about CoolPreviews: you can look up something in the dictionary, Wikipedia, or Google without leaving the page. Another cool thing is that if you decide you need the link, you can put in in a tab.
The "send link" is the only thing I haven't got to work. Still -- perfect add-on.