diff --git a/src/ioslaves/file/file.cpp b/src/ioslaves/file/file.cpp
--- a/src/ioslaves/file/file.cpp
+++ b/src/ioslaves/file/file.cpp
@@ -338,7 +338,7 @@
 void FileProtocol::redirect(const QUrl &url)
 {
     QUrl redir(url);
-    redir.setScheme(config()->readEntry("DefaultRemoteProtocol", "smb"));
+    redir.setScheme(mapConfig().value(QStringLiteral("DefaultRemoteProtocol"), QStringLiteral("smb")).toString());
 
     // if we would redirect into the Windows world, let's also check for the
     // DavWWWRoot "token" which in the Windows world tells win explorer to access
@@ -595,7 +595,8 @@
     QT_STATBUF buff_orig;
     const bool bOrigExists = (QT_LSTAT(QFile::encodeName(dest_orig).constData(), &buff_orig) != -1);
     bool bPartExists = false;
-    const bool bMarkPartial = config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = mapConfig().value(QStringLiteral("MarkPartial"), QVariant(true)).toBool();
+    // = mapConfig().value(QStringLiteral(""), QVariant(true)).toBool();
 
     if (bMarkPartial) {
         QT_STATBUF buff_part;
@@ -723,7 +724,7 @@
 
             QT_STATBUF buff;
             if (QT_STAT(QFile::encodeName(dest).constData(), &buff) == 0) {
-                int size = config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+                int size = mapConfig().value(QStringLiteral("MinimumKeepSize"), QVariant(DEFAULT_MINIMUM_KEEP_SIZE)).toInt();
                 if (buff.st_size <  size) {
                     QFile::remove(dest);
                 }
diff --git a/src/ioslaves/file/file_unix.cpp b/src/ioslaves/file/file_unix.cpp
--- a/src/ioslaves/file/file_unix.cpp
+++ b/src/ioslaves/file/file_unix.cpp
@@ -494,7 +494,7 @@
 {
     if (!isLocalFileSameHost(url)) {
         QUrl redir(url);
-        redir.setScheme(config()->readEntry("DefaultRemoteProtocol", "smb"));
+        redir.setScheme(mapConfig().value(QStringLiteral("DefaultRemoteProtocol"), QStringLiteral("smb")).toString());
         redirection(redir);
         // qDebug() << "redirecting to " << redir;
         finished();
diff --git a/src/ioslaves/file/file_win.cpp b/src/ioslaves/file/file_win.cpp
--- a/src/ioslaves/file/file_win.cpp
+++ b/src/ioslaves/file/file_win.cpp
@@ -191,7 +191,7 @@
 
     if (!url.isLocalFile()) {
         QUrl redir(url);
-        redir.setScheme(config()->readEntry("DefaultRemoteProtocol", "smb"));
+        redir.setScheme(mapConfig().value(QStringLiteral("DefaultRemoteProtocol"), QStringLiteral("smb")).toString());
         redirection(redir);
         // qDebug() << "redirecting to " << redir;
         finished();
diff --git a/src/ioslaves/ftp/ftp.cpp b/src/ioslaves/ftp/ftp.cpp
--- a/src/ioslaves/ftp/ftp.cpp
+++ b/src/ioslaves/ftp/ftp.cpp
@@ -327,7 +327,7 @@
     qCDebug(KIO_FTP) << _host << "port=" << _port << "user=" << _user;
 
     m_proxyURL.clear();
-    m_proxyUrls = config()->readEntry("ProxyUrls", QStringList());
+    m_proxyUrls = mapConfig().value(QStringLiteral("MarkPartial"), QVariant(QStringList())).toStringList();
     qCDebug(KIO_FTP) << "proxy urls:" << m_proxyUrls;
 
     if (m_host != _host || m_port != _port ||
@@ -381,7 +381,7 @@
         }
     }
 
-    m_bTextMode = config()->readEntry("textmode", false);
+    m_bTextMode = mapConfig().value(QStringLiteral("textMode"), QVariant(false)).toBool();
     connected();
 
     // Redirected due to credential change...
@@ -518,11 +518,11 @@
     QString user(m_user);
     QString pass(m_pass);
 
-    if (config()->readEntry("EnableAutoLogin", false)) {
-        QString au = config()->readEntry("autoLoginUser");
+    if (mapConfig().value(QStringLiteral("EnableAutoLogin"), QVariant(false)).toBool()) {
+        QString au = mapConfig().value(QStringLiteral("autoLoginUser"), QVariant("")).toString();
         if (!au.isEmpty()) {
             user = au;
-            pass = config()->readEntry("autoLoginPass");
+            pass = mapConfig().value(QStringLiteral("autoLoginPass"), QVariant("")).toString();
         }
     }
 
@@ -538,7 +538,7 @@
 
     // Check for cached authentication first and fallback to
     // anonymous login when no stored credentials are found.
-    if (!config()->readEntry("TryAnonymousLoginFirst", false) &&
+    if (!mapConfig().value(QStringLiteral("TryAnonymousLoginFirst"), QVariant(false)).toBool() &&
             pass.isEmpty() && checkCachedAuthentication(info)) {
         user = info.username;
         pass = info.password;
@@ -585,7 +585,7 @@
             info.keepPassword = true; // Prompt the user for persistence as well.
             info.setModified(false);  // Default the modified flag since we reuse authinfo.
 
-            const bool disablePassDlg = config()->readEntry("DisablePassDlg", false);
+            const bool disablePassDlg = mapConfig().value(QStringLiteral("DisablePassDlg"), QVariant(false)).toBool();
             if (disablePassDlg) {
                 error(ERR_USER_CANCELED, m_host);
                 return false;
@@ -686,7 +686,7 @@
         qCWarning(KIO_FTP) << "SYST failed";
     }
 
-    if (config()->readEntry("EnableAutoLoginMacro", false)) {
+    if (mapConfig().value(QStringLiteral("EnableAutoLoginMacro"), QVariant(false)).toBool()) {
         ftpAutoLoginMacro();
     }
 
@@ -954,15 +954,15 @@
     int  iErrCodePASV = 0;  // Remember error code from PASV
 
     // First try passive (EPSV & PASV) modes
-    if (!config()->readEntry("DisablePassiveMode", false)) {
+    if (!mapConfig().value(QStringLiteral("DisablePassiveMode"), QVariant(false)).toBool()) {
         iErrCode = ftpOpenPASVDataConnection();
         if (iErrCode == 0) {
             return 0;    // success
         }
         iErrCodePASV = iErrCode;
         ftpCloseDataConnection();
 
-        if (!config()->readEntry("DisableEPSV", false)) {
+        if (!mapConfig().value(QStringLiteral("DisableEPSV"), QVariant(false)).toBool()) {
             iErrCode = ftpOpenEPSVDataConnection();
             if (iErrCode == 0) {
                 return 0;    // success
@@ -2095,7 +2095,7 @@
     if (m_user.isEmpty() || m_user == QLatin1String(FTP_LOGIN)) {
         bMarkPartial = false;
     } else {
-        bMarkPartial = config()->readEntry("MarkPartial", true);
+        bMarkPartial = mapConfig().value(QStringLiteral("MarkPartial"), QVariant(true)).toBool();
     }
 
     QString dest_orig = dest_url.path();
@@ -2207,7 +2207,7 @@
         if (bMarkPartial) {
             // Remove if smaller than minimum size
             if (ftpSize(dest, 'I') &&
-                    (processed_size < config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE))) {
+                    (processed_size < mapConfig().value(QStringLiteral("MinimumKeepSize"), QVariant(DEFAULT_MINIMUM_KEEP_SIZE)).toInt())) {
                 const QByteArray cmd = "DELE " + remoteEncoding()->encode(dest);
                 (void) ftpSendCmd(cmd);
             }
@@ -2432,7 +2432,7 @@
     bool bResume = false;
     QFileInfo sPartInfo(sPart);
     const bool bPartExists = sPartInfo.exists();
-    const bool bMarkPartial = config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = mapConfig().value(QStringLiteral("MarkPartial"), QVariant(true)).toBool();
     const QString dest = bMarkPartial ? sPart : sCopyFile;
     if (bMarkPartial && bPartExists && sPartInfo.size() > 0) {
         // must not be a folder! please fix a similar bug in kio_file!!
@@ -2505,7 +2505,7 @@
         } else {
             sPartInfo.refresh();
             if (sPartInfo.exists()) { // should a very small ".part" be deleted?
-                int size = config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+                int size = mapConfig().value(QStringLiteral("MinimumKeepSize"), QVariant(DEFAULT_MINIMUM_KEEP_SIZE)).toInt();
                 if (sPartInfo.size() <  size) {
                     QFile::remove(sPart);
                 }
diff --git a/src/ioslaves/http/http.cpp b/src/ioslaves/http/http.cpp
--- a/src/ioslaves/http/http.cpp
+++ b/src/ioslaves/http/http.cpp
@@ -443,9 +443,9 @@
     m_request.keepAliveTimeout = 0;
 
     m_request.redirectUrl = QUrl();
-    m_request.useCookieJar = config()->readEntry("Cookies", false);
-    m_request.cacheTag.useCache = config()->readEntry("UseCache", true);
-    m_request.preferErrorPage = config()->readEntry("errorPage", true);
+    m_request.useCookieJar = mapConfig().value(QStringLiteral("Cookies"), QVariant(false)).toBool();
+    m_request.cacheTag.useCache = mapConfig().value(QStringLiteral("UseCache"), QVariant(true)).toBool();
+    m_request.preferErrorPage = mapConfig().value(QStringLiteral("errorPage"), QVariant(true)).toBool();
     const bool noAuth = config()->readEntry("no-auth", false);
     m_request.doNotWWWAuthenticate = config()->readEntry("no-www-auth", noAuth);
     m_request.doNotProxyAuthenticate = config()->readEntry("no-proxy-auth", noAuth);
@@ -462,7 +462,7 @@
     m_request.referrer.clear();
     // RFC 2616: do not send the referrer if the referrer page was served using SSL and
     //           the current page does not use SSL.
-    if (config()->readEntry("SendReferrer", true) &&
+    if (mapConfig().value(QStringLiteral("SendReferrer"), QVariant(true)).toBool() &&
             (isEncryptedHttpVariety(m_protocol) || metaData(QStringLiteral("ssl_was_in_use")) != QLatin1String("TRUE"))) {
         QUrl refUrl(metaData(QStringLiteral("referrer")));
         if (refUrl.isValid()) {
@@ -479,7 +479,7 @@
         }
     }
 
-    if (config()->readEntry("SendLanguageSettings", true)) {
+    if (mapConfig().value(QStringLiteral("SendLanguageSettings"), QVariant(true)).toBool()) {
         m_request.charsets = config()->readEntry("Charsets", DEFAULT_PARTIAL_CHARSET_HEADER);
         if (!m_request.charsets.contains(QLatin1String("*;"), Qt::CaseInsensitive)) {
             m_request.charsets += QLatin1String(",*;q=0.5");
@@ -511,12 +511,12 @@
         m_request.endoffset = 0;
     }
 
-    m_request.disablePassDialog = config()->readEntry("DisablePassDlg", false);
-    m_request.allowTransferCompression = config()->readEntry("AllowCompressedPage", true);
+    m_request.disablePassDialog = mapConfig().value(QStringLiteral("DisablePassDlg"), QVariant(false)).toBool();
+    m_request.allowTransferCompression = mapConfig().value(QStringLiteral("AllowCompressedPage"), QVariant(true)).toBool();
     m_request.id = metaData(QStringLiteral("request-id"));
 
     // Store user agent for this host.
-    if (config()->readEntry("SendUserAgent", true)) {
+    if (mapConfig().value(QStringLiteral("SendUserAgent"), QVariant(true)).toBool()) {
         m_request.userAgent = metaData(QStringLiteral("UserAgent"));
     } else {
         m_request.userAgent.clear();
@@ -2582,7 +2582,7 @@
         }
 
         // DoNotTrack feature...
-        if (config()->readEntry("DoNotTrack", false)) {
+        if (mapConfig().value(QStringLiteral("DoNotTrack"), QVariant(false)).toBool()) {
             header += QLatin1String("DNT: 1\r\n");
         }
 
@@ -2662,7 +2662,7 @@
 void HTTPProtocol::forwardHttpResponseHeader(bool forwardImmediately)
 {
     // Send the response header if it was requested...
-    if (!config()->readEntry("PropagateHttpHeader", false)) {
+    if (!mapConfig().value(QStringLiteral("PropagateHttpHeader"), QVariant(false)).toBool()) {
         return;
     }
 
@@ -3511,7 +3511,7 @@
         return parseHeaderFromCache();
     }
 
-    if (config()->readEntry("PropagateHttpHeader", false) ||
+    if (mapConfig().value(QStringLiteral("PropagateHttpHeader"), QVariant(false)).toBool() ||
             m_request.cacheTag.ioMode == WriteToCache) {
         // store header lines if they will be used; note that the tokenizer removing
         // line continuation special cases is probably more good than bad.