Symptom
When you view a webpage the webpage looks the same even though certain changes have been made.
Cause
Webpages have a timestamp so that browsers know if the locally stored version is different to the timestamp of the currently available version on the website. Changes to some aspects of a page's design, such as Cascading Style Sheets (CSS), don't update a page's timestamp.
Resolution
You are using you need for force a complete reload of the locally stored version of a webpage regardless of the timestamp. The accepted standard method for reloading a webpage is to press [CTRL]+[F5]. Some browsers may have other ways of achieving a webpage reload but pressing [CTRL]+[F5] will usually work.