Dear Sir, i used cache viewer for the first time with nightly 17 64bit on a 64 bit windows 7. after having issues with flash player i deleted the 64bit version of ff and installed a completely new version with default setting. i'm now on ff 21.0a 32bit on win7 64bit. i installed cache viewer continued in latest version. the cache viewer could be started and also shows all entries. BUT the entries have no mime type anymore. so you can't get any preview of gifs or jpegs anymore.
Issue #24 resolved