I am a website producer and preview pages in Firefox after building them in a content management system (also running in a Firefox window). Often I make changes to pages after previewing the page. However when I load the page again to check my changes, Firefox displays the original version again. Reloading the page does not help, but if I switch to Internet Explorer I don't experience this problem. Everything used to work fine but one day this problem started occurring, possibly after an update. Can anyone help please? == This happened == Every time Firefox opened == Not sure, but possibly after an update