My browser window and secure sites state I have an outdated version of Firefox though the 'about firefox' states its version 8....whats going on and how do I fix?

When I open the browser window (with Google as the homepage) this message is there..."URGENT! Your version of Firefox is no longer protected against online attacks. Get the upgrade - it’s fast and free! "...I have upgraded several times using the link but the warning continues. When I am in sites like Paypal this warning is stated "Update your browser: It looks like you're using an older browser that may have security issues. Help protect your account. " When I follow the HELP prompts to assess my current version in 'About Firefox' in the help menu it states that Firefox is up to date and 8.