Mozilla Test Pilot's first test

Today, the Mozilla Labs team has published the first test, Tab Open / Close , for Test Pilot users. This test collects information about how many tabs you have and what you do when you close a tab (stay on selected or change)
In order to participate in the collection of information, you need to install the Firefox extension and populate a small profile after installation.
Those who already have Test Pilot installed do not need to take any action to participate in the test, information will be collected by itself.

I hope this information will help the Mozilla Foundation to further improve their browsers.

Clarification: the description of this test says that only information about the number of open tabs and about your actions with them, not about their contents, is sent.