Choose "Empty Caches" from the "Develop" menu.Close up Preferences and you will now have a "Develop" menu.Check the box at the bottom that says "Show Develop menu in menu bar.".To clear the cache, choose the "Advanced" tab in the "Safari->Preferences" window.You can either remove all cookies, or select specific ones and remove only those.In the "Coookies and website data" section click on "Manage Website Data.".To remove cookies, in Safari, select "Safari->Preferences.".If you're not sure which version of Safari you have, select "Safari->About Safari" to find out. Uncheck "Browsing history," but keep "Cookies and other site data" and "Cached images and files" selected.In Chrome, on the menu on the right select "More Tools/Clear Browsing Data.".Expand the Details section and uncheck everything except "Cache" and/or "Cookies.".For "Time range to clear" select "Everything.".
In Firefox, select Tools→"Clear Recent History…" (In recent installations of Firefox for Windows you may find this under Firefox→History, or History→Clear Recent History, or Menu→Options→Privacy→Clear Recent History.).Clearing the Cache and/or Cookies Firefox If you get an error about cookie problems you may want to remove the cookies just remember that you may experience inconveniences when you visit certain sites. That way, the site can customize the pages you see the next time you visit. For example, if you look at a flight schedule on an airline's website, the site might create a cookie that records the pages you visited on the site. Cookies typically contain information about you and your preferences for a website. Some websites store information in a small text file, called a "cookie" on your hard disk. If you are having either of these problems, try clearing your browser cache. This may also prevent a web page from loading in the most up-to-date information. While this generally improves your browsing experience, it can slow things down if the cache gets too big. Web browsers (Firefox, Safari, Chrome, and Internet Explorer) maintain a local copy of web pages and other related items on your disk or in memory to speed up reloading of previously visited pages from the Internet. This is generally helpful, but can occasionally cause problems. Web browsers store information on your computer.