about:cache | To see your disk cache. |
about:memory-cache | To see your memory cache. |
about:image-cache | To see the images in libimg cache. |
about:cache?long | To see the long form of cache. |
about:cache?traceon | To switch on trace messages from the cache. |
about:cache?traceoff | To switch off trace messages. |
When you hit the Shift-Reload, it does a plain GET or an unconditional request and hence you never get anything from the cache.
user_pref("browser.cache.disk_cache_ssl",true);You will have to make this change after shutting down any running Navigator or Communicator. By default this value is false, and so no disk caching of SSL objects takes place.