This article explains how to log in to a SharePoint 2010 site. You may notice multiple behaviors depending on a number of factors; this article discusses some of the more common scenarios.
Because most SharePoint 2010 sites are configured to use NTLM authentication it is necessary to prefix your username with the name of your Active Directory domain: adlocal if using a CNetID or uchad if using a Medical Center account. An example would be adlocal\jmith or uchad\jsmith.
If your computer is managed by IT Services then it should have already been configured for pass-through authentication so you may not be prompted for authentication. If you are prompted, instructions for configuring pass-through authentication can be found here. You may need to contact your local IT support staff to complete the procedure detailed in the article.
It is possible to configure Firefox to use pass-through authentication so that you are not prompted for authentication. Instruction for configuring this can be found here. You may need to contact your local IT support staff to complete the procedure detailed in the article.
In this scenario, pass-through authentication cannot be used, but you can check the box to have IE remember your password in the login prompt.
In this scenario, pass-through authentication cannot be used, but after entering your username and password, Firefox will prompt to remember the password. If you allow this, you will still see a login prompt on subsequent visits, but your username and password will be pre-populated.