Do "back button" clicks only mean the physical (err. how else do you say this?) clicking off the button or does hitting the back button on my mouse trigger this?<p>I use back a TON, but I can't remember the last time I clicked a back button.
There are a few things this heat-map is not showing that are pretty important and may negatively affect their redesign decisions.<p>1) Add-Ons.
If we have add-ons that make other areas of the browser clickable, and those areas are highly used by a high number of add-on users, then that too may need to be taken into consideration on the redesign.
Example: a downloads bar at the bottom of the page, or maybe firebug.<p>2) Visuals that may or may not be turned on. For example, the X on each of the tabs. I close out tabs a lot, and that little X I have next to each tab is probably used more than any other button.<p>3) Custom settings. I guess this doesn't matter as much, but I, for example, have my settings in such a way that more tabs display across the top than the default install, so I never use that annoying down arrow on the right.
I think the right scroll bar is difficult to use in most browsers without a maximized window. There needs to be a better UI for vertical scrolling, for example grow the right bar as your mouse moves closer so there is more surface area to drag.
Some of the more interesting data is when beginner and advanced use of a feature is similar, but intermediate use is way different. Scroll vertical up is 16.7 and 14.4 for beginners and advanced users, but 54.9 for intermediate users. So beginners don't scroll up and advanced users use the page-up key? Reload is similar, beginners don't reload as much as intermediate users and advanced users use F5.<p>Harder to explain is why location bar clicking goes down once users become intermediate, and then goes back up when they become advanced users.