As you visit a web page, most browsers save a copy of it on your computer in a temporary location called the cache, which helps your computer load that page more quickly on subsequent visits. While this is a great time-saving feature in most cases, it can occasionally cause conflicts on some pages if the cached copy is out of date.
Outlined below are the shortcuts to clear your cache.
Chrome (for Mac or Windows) - Cmd+Shift+Delete | Ctrl+Shift+Delete
Firefox (for Mac or Windows) - Cmd+Shift+Delete | Ctrl+Shift+Delete
Internet Explorer - Ctrl+Shift+Delete
Safari (for Mac) - Cmd+Option+E