public final void exitBrowser() {
   if (mSipBranch) {
     Intent intent = new Intent(Intent.ACTION_MAIN);
     intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
     intent.addCategory(Intent.CATEGORY_HOME);
     startActivity(intent);
     return;
   }
   if (null != mBrowser) {
     mBrowser.onAppStop();
   }
   mBrowserAround.removeViewImmediate();
   LocalActivityManager lm = getLocalActivityManager();
   lm.removeAllActivities();
   clean();
   finish();
   Process.killProcess(Process.myPid());
 }