If you have carefully watched Mozilla FireFox, there is a very good webservice link embedded in the Help Menu. You can locate it at Help -> Report Broken Web site. This launched a pop window from the Mozilla Reporter Service.
The introductory paragraph on the Mozilla Reporter tells that the website information is sent to Mozilla Development Evangelism Team for thier analysis and betterment of Mozilla products and for best surfing engine to be built into Mozilla FireFox. This way, collecting patterns of data purely for diagnosis is also observed in Windows as "Microsoft Customer Experience Improvement Programme" This would enhance the quality of software for exact realtime usage. Also, I would like to recall about one more Windows website that is oriented towards realtime error reporting in Windows. You can visit the same in Microsoft Online Crash Analysis website.