Mouse Gestures is an add-on to Mozilla's Firefox browser. This add-on lets you perform certain browser functions like scrolling, zooming and opening new page tabs, by drawing specific little squiggles on screen with your mouse pointer instead of having to drag the cursor up to a tab or scroll bar.
Once you get the hang of it and remember which gesture does what, you can take a few miles off your mouse because you perform whatever action you need right where your cursor is. There is a visual setting you can use to display a colored trail of pixels so you can see the gesture you are performing.
You can download and install Mouse Gestures 1.5.2 for Firefox at http://addons.mozilla.org/en-US/firefox/addon/39
Once it is installed, you add, delete or edit gestures, adjust the settings and even print out a little chart of gesture patterns to help you learn the moves. To get to the preferences box in Firefox, go to the Tools menu, then to Add-ons. Scroll down to Mouse Gestures in the list of add-ons and click the Options button.
The current version supports Windows and Linux systems and although there is a Mac OS X edition available, development was stopped with version 1.5.