In order to create a better web experience, your web browser will store snapshots or copies of the original web pages that you have previously visited, so that when you return to them, your experience will be smooth and easy.  These saved (or cached) web pages can take up space and cause your web browser to act glitchy (proper technical term).  If your browser does not seem to be working properly, or a web page's functionality is not up to par, try clearing your web browser's cache.  Demos for each web browser are shown below. (For now, Internet Explorer is not included with these.  I apologize for any inconvenience on this.)

Safari web browser:

Chrome web browser:

Firefox web browser: