When you encounter strange behavior, first try bypassing your cache. This is sometimes referred to as a 'hard refresh', 'cache refresh', or 'uncached reload'. the browser insists on showing out-of-date content) making it necessary to bypass the cache, thus forcing your browser to re-download a web page's complete, up-to-date content. Occasionally this caching scheme goes awry (e.g. To speed things up and conserve communications bandwidth, browsers attempt to keep local copies of pages, images, and other content you've visited, so that it need not be downloaded again later.
Hold down ⇧ Shift and click the Reload toolbar button.Bypassing your cache is simple, safe, and causes no permanent changes.
It is also required after installing user scripts. This page in a nutshell: Bypassing your cache means forcing your web browser to re-download a web page from scratch, which can often solve website display glitches.
