Recently my laptop had to go into the shop and I was forced to use our home computer. Not a problem except that my wife has become quite the Firefox fan. Each time I went online, I had to log her out of sites like Google and Yahoo. Once I realized that she didn’t have my favorite Firefox extensions installed, something had to be done.
The solution is Firefox’s Profile Manager. The Profile Manager allows multiple users to have their own cookies, bookmarks, passwords and extensions without having to log out of the operation system.
Use the instructions (for Windows, Linux and Mac) at Mozilla.org to create your own additional profiles.