Mozilla is in early stages of planning to develop a tool to help itself grow by gathering data from Firefox users to help improve applications like Thunderbird and web functions. The add-on will collect demographic information like the user's technical level and geographic location.
The add-on is completely optional to participate and not required for all users to install. Information like browsing history and content viewed will not be collected, but the add-on might count and collect the amount of time a user reads the same site. Aza Raskin, head of the Mozilla Labs mentioned that privacy is a huge concern for both Mozilla and its users, and will not force the program on its users, but instead only wants to convince 1% of Firefox users to participate.