To disable the PSM default support for browser sessions, the option SupportBrowsers should be set to 'No' before running the hardening process. This configuration change is made within the PSM’s configuration files, typically found in the PSM's administrative interface or directly within specific XML configuration files like PSMHardening.xml. Setting this option to 'No' prevents the PSM from processing session requests that involve web browsers, thereby enhancing security by limiting the session types the PSM will support. This setting is particularly important in environments where web browsing sessions are deemed unnecessary or too risky.