I found some great links for Firefox. I am having some trouble with performance. When I backspace, it is painfully slow. Here are some links that might help (I am still working through them):
Firefox optimization and troubleshooting thread
I knew about the -P option to use different profiles, but that doesn’t allow you to have multiple sessions still. But, I learned from this page that I could add the -no-remote option to run multiple profiles at the same time. This way I can have two instances or sessions running at the same time. I can separate multiple web applications.