The ability to do usability testing more naturally (not in a lab) as well as get more data (not a one hour session) have been issues that usability professionals have dealt with for years. Leave it to the innovators at Mozilla Labs to help get us out of the rut of lab testing.
Soon we will have Test Pilot. An add-on that will allow usability testing in their ‘natural environment’. Testers can target specific questions, like how many tabs users keep open, how often they press certain buttons, or even ask detailed questions when triggered by certain events.