Another Firefox extension, which creates a sidebar with a chat channel for Web
pages. That makes it about #4:
"Surfing the web is like travelling alone. You get to see beautiful places,
funny places, interesting places, yet they all have one bad thing in common:
Of course it only seems so. There's people visiting the same place you're
visiting: reading your blog, listening to music you like, checking out the same
movie, the same book.
Wouldn't it be nice if they were just a click away?
Now they are."