The All-In-One-Gestures plugin for Firefox is a plugin that enables you to accomplish nearly every task you want to in Firefox with the help of drawing lines on the screen.
Use All in One Gestures in Firefox
You just need to assign the directions for the common task in the preferences and start drawing:
By default, the key for drawing gestures is the middle-mouse key, meaning the mouse wheel, which can be changed, however. Customize the plugin easily, it is highly customizable. As you will see at first glance when opening the options window. The plugin is updated regularly to be up-to-date with Firefox' fast updates.
To show an example, as seen in the options table above, the following gesture will duplicate the current tab:
This shows the Gestures as red lines on the screen by default. This allows you to see what you are drawing. Additionally, the tool can be (mis)used to draw funny pictures on your Firefox windows!