1. Install the add-on from the link in Firefox 14 and above. 2. Open the UI for the developer tool "Graphical Timeline" using any of the following method: a. Ctrl + Shift + Q b. Tools/App Menu > Web Developer > Timeline c. Shift + F2 and then click Timeline 3. Click record to start recording events. 4. Have fun :)

PS: for more info, visit http://grssam.com/2012/08/gsoc-comes-to-an-end/