Chrome: Scrollbar Anywhere is a lightweight extension that adds customisable scrolling to Google Chrome, sans using a scrollwheel or the browser scrollbar, via mouse click.
If your mouse lacks for a scrollwheel, or you simply want the ability to click anywhere in the Chrome browsing pane and begin scrolling, Scrollbar Anywhere adds in mouse-based scrolling that isn’t dependent on clicking the scrollbar or using a scrollwheel. After installing the app the default setting is to hold down the right mouse button for a second until the directional arrows appear — seen in the screenshot above. You can tweak the settings to use other mouse buttons as well as the mouse plus keys (such as Right Mouse + Shift). You can also toggle the cursor change off, adjust the speed of the scroll, and the speed at which the scrolling stops.
For another scroll-enhancing extension, check out previously reviewed AutoPagerize to convert articles broken into multiple pages into one long scrollable document. Scrollbar Anywhere is free and works wherever Google Chrome does.