Install the plug in as directed. After you install the 'plug in' on your browser, you must restart the browser.  Most plug ins have 'Admin' as the default user name, change it to 'view' and click login. (no password required)

User Name: view 
Password: leave blank

On IOS or Android you will receive a message to install plug in on your browser as well. You cannot install it on these devices.  You must use the 'foscam viewer' app from the appropriate app store.