JavaScript实现文件下载
function downloadFile(url){ var file = Components.classes["@mozilla.org/file/local;1"] .createInstance(Components.interfaces.nsILocalFile); file.initWithPath("C:\\example.txt"); var ios = Components.classes['@mozilla.org/network/io-service;1'] .getService(Components.interfaces.nsIIOService); var uri = ios.newURI(url, null, null); var persist = Components.classes["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"] .createInstance(Components.interfaces.nsIWebBrowserPersist); const nsIWBP = Components.interfaces.nsIWebBrowserPersist; const flags = nsIWBP.PERSIST_FLAGS_REPLACE_EXISTING_FILES; persist.persistFlags = flags | nsIWBP.PERSIST_FLAGS_FROM_CACHE; persist.saveURI(uri, null, null, null, null, file);}