Allows you to draw directly on webpages when you press Shift+Alt+D
Press Shift+Alt+d to begin drawing on the page. Press Shift+Alt+d again to control the page again. Should work on all websites.
Hold shift to open the eraser. (Undo not implemented, too much work :/)
Right click when in drawing mode to clear and save the canvas or change the brush color.
Intended uses: quick whiteboard, pointing something out while screen-sharing.