Emulates dragging scrollbar with your middle mouse button anywhere on the page.
Warning: very addictive!
ScrollAnywhere enables you to scroll with your middle (or right) mouse button without actually touching scrollbar. Just hold middle button and move mouse up-down or left-right. You can also change the behavior to simple "grab and drag" style.
Warning: very addictive! :)
PS: Chrome blocks these kind of extensions on some special pages like chrome://extensions/ or https://chrome.google.com/webstore ... so ScrollAnywhere (except here and there :))