pref("extensions.fb2epub.checkforFB2ZIP", true); // filter files with FB2.ZIP extension
pref("extensions.fb2epub.checkforFB2RAR", true); // filter files with FB2.RAR extension
pref("extensions.fb2epub.checkforANYZIP", false); // filter files with .ZIP extension
pref("extensions.fb2epub.checkforANYRAR", false); // filter files with .RAR extension
pref("extensions.fb2epub.checkAdditional", false); // filter additional (user specified) extensions or not
pref("extensions.fb2epub.additionalExtensions", ""); //a string contained additional ';' separated file extensions to check/convert