Firefox 3. (beta)

I usually have 15 to 18 separate windows open when I browse using Firefox, each having anywhere from 1 to 10 separate tabs open. It can be a huge resource hog; so I'm intensely concerned that a new version of Firefox might be worse.

According to this, while the initial loading may consume more memory, leaving all the window and tabs open like I do will actually result in less memory being consumed than with Firefox 2.0.

Thumbs up.