If a file with another filename extension is downloaded through HTTP, Java Plug-in will make a URL connection itself using the proxy configuration in the browser. The disk caching policy can be configured in the user preference dialog in both browsers. Check for newer versions every session. Never for check newer versions. When the disk caching policy is changed in the browser, it will take effect the next time a URL connection needs to be made from Java Plug-in.
Users can adjust the size of the cache from the user preference dialog in the browser.
In this case, disk caching may fail and Java Plug-in will make a URL connection itself using the proxy configuration in the browser. In addition, if the cache size is too small and an applet needs to be downloaded into the cache, it may result in the browser pruning existing downloaded applets or beans in the cache. The order of pruning in the cache is dependent on each browser's implementation. Thus it is important to make sure that the cache size of your browser is properly adjusted. For more information about the disk caching policy in your browser, please consult the user guide for your browser.