updated 05:50 pm EDT, Tue September 1, 2009
Chrome browser only in OS
A dug up line of code indicates Google's upcoming Chrome OS may have what is being called a Chrome OS login manager. While its significance can only be guessed at, it indicates that the Chrome web browser will be very closely integrated with the operating system. There is also speculation of the OS not allowing users to operate other web browsers on their machines. The login manager will be a single sign-on (SSO) cookie, eliminating the need for users to sign into their Google services, such as Gmail, Calendars, Docs, etc separately.
As the Chrome browser will be preloaded with the OS, the manager would make integrating other web browsers more complicated, if only because they would need to log in more than once to the each Google service. It's uncertain if the login would be tied to accessing the system, however. [via ReadWriteWeb]