Update common.py (#255)

Author: GolDNenex

usr/lib/webapp-manager/common.py

@@ -284,6 +284,7 @@ def get_exec_string(self, browser, codename, custom_parameters, icon, isolate_pr
             firefox_profile_path = os.path.join(firefox_profiles_dir, codename)
             exec_string = ("sh -c 'XAPP_FORCE_GTKWINDOW_ICON=\"" + icon + "\" " + browser.exec_path +
                            " --class WebApp-" + codename +
+                           " --name WebApp-" + codename +
                            " --profile " + firefox_profile_path +
                            " --no-remote ")
             if privatewindow: