--- a/ui/mainwindow.cpp	Wed Jun 18 11:22:15 2014 +0200
+++ b/ui/mainwindow.cpp	Wed Jun 18 14:40:06 2014 +0200
@@ -27,6 +27,19 @@
 #include <QImage>
 #include <QCheckBox>
 
+#include "certificatelist.h"
+#include "downloader.h"
+#include "helpdialog.h"
+#include "aboutdialog.h"
+#include "certificateitemdelegate.h"
+#include "separatoritemdelegate.h"
+#include "installwrapper.h"
+#include "util.h"
+#include "logging.h"
+#include "binverify.h"
+#include "processhelp.h"
+#include "processwaitdialog.h"
+
 // The amount of time in minutes stay silent if we have
 // something to say
 #define NAG_INTERVAL_MINUTES 70
@@ -55,17 +68,6 @@
 # endif
 #endif
 
-#include "certificatelist.h"
-#include "downloader.h"
-#include "helpdialog.h"
-#include "aboutdialog.h"
-#include "certificateitemdelegate.h"
-#include "separatoritemdelegate.h"
-#include "installwrapper.h"
-#include "util.h"
-#include "logging.h"
-#include "binverify.h"
-
 MainWindow::MainWindow(bool trayMode):
     mTrayMode(trayMode)
 {
@@ -508,7 +510,7 @@
     installButton = new QPushButton(tr("Install selected"));
     installButton->setFixedHeight(80);
     connect(installButton, SIGNAL(clicked()), this, SLOT(resizeButtons()));
-    connect(installButton, SIGNAL(clicked()), this, SLOT(installCerts()));
+    connect(installButton, SIGNAL(clicked()), this, SLOT(checkAndInstallCerts()));
     quitButton = new QPushButton(tr("Quit"));
     quitButton->setFixedHeight(20);
     connect(quitButton, SIGNAL(clicked()), this, SLOT(closeApp()));
@@ -855,3 +857,27 @@
     saveUnselectedCertificates();
     qApp->quit();
 }
+
+void MainWindow::checkAndInstallCerts()
+{
+    /* Checking before opening the dialog should be cheaper */
+    QList<int> pids = ProcessHelp::getProcessesIdForName("firefox");
+    pids.append(ProcessHelp::getProcessesIdForName("thunderbird"));
+
+    if (pids.isEmpty()) {
+        installCerts();
+        return;
+    }
+
+    QStringList pNames;
+    pNames << "firefox" << "thunderbird";
+
+    ProcessWaitDialog *waitDialog = new ProcessWaitDialog(this, pNames);
+
+    connect(waitDialog, SIGNAL(accepted()), this, SLOT(installCerts()));
+    connect(waitDialog, SIGNAL(accepted()), waitDialog, SLOT(deleteLater()));
+
+    waitDialog->exec();
+
+    return;
+}