Browser supporting multiple users

A non-transitory machine-accessible storage medium including instructions that, when executed by a client machine, cause the client machine to perform operations comprising:

• initiating, by the client machine, a browser instance of a browser;
• selecting a first user identifying state by the client machine for the browser instance prior to accessing any web pages by the browser instance, wherein the first user identifying state is associated with a first data structure set that comprises two or more of a first browser history, a first browser cache or a first cookie that are stored at the client machine;
• using the first user identifying state in a session between the browser instance and a server;
• and
• updating one or more of the first browser history, the first browser cache or the first cookie of the first data structure set based on the session without updating a second data structure set associated with a second user identifying state, wherein the second data structure set includes two or more of a second browser history, a second browser cache or a second cookie.

A client machine comprising:

• a memory;
• and
• a processing device coupled to the memory, the processing device to:
• initiate a browser instance of a browser;
• select a first user identifying state for the browser instance prior to accessing any web pages by the browser instance, wherein the first user identifying state is associated with a first data structure set that comprises two or more of a first browser history, a first browser cache or a first cookie that are stored at the client machine;
• use the first user identifying state in a session between the browser instance and a server;
• and
• update one or more of the first browser history, the first browser cache or the first cookie of the first data structure set based on the session without updating a second data structure set associated with a second user identifying state, wherein the second data structure set includes two or more of a second browser history, a second browser cache or a second cookie.