diff --git a/htdocs/core/ajax/pingresult.php b/htdocs/core/ajax/pingresult.php
index 3055942f89a..67608c24162 100644
--- a/htdocs/core/ajax/pingresult.php
+++ b/htdocs/core/ajax/pingresult.php
@@ -32,7 +32,7 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
 
 $action=GETPOST('action', 'alpha');
 $hash_unique_id=GETPOST('hash_unique_id', 'alpha');
-$hash_algo=GETPOST('hash', 'alpha');
+$hash_algo=GETPOST('hash_algo', 'alpha');
 
 
 // Security check
@@ -53,7 +53,7 @@ print '<!-- Ajax page called with url '.dol_escape_htmltag($_SERVER["PHP_SELF"])
 // If ok
 if ($action == 'firstpingok')
 {
-	// Note: pings are by entities
+	// Note: pings are by installation, done on entity 1.
 	dolibarr_set_const($db, 'MAIN_FIRST_PING_OK_DATE', dol_print_date($now, 'dayhourlog', 'gmt'));
 	dolibarr_set_const($db, 'MAIN_FIRST_PING_OK_ID', $hash_unique_id);
 
@@ -62,7 +62,7 @@ if ($action == 'firstpingok')
 // If ko
 elseif ($action == 'firstpingko')
 {
-	// Note: pings are by entities
+	// Note: pings are by installation, done on entity 1.
 	dolibarr_set_const($db, 'MAIN_LAST_PING_KO_DATE', dol_print_date($now, 'dayhourlog'), 'gmt');
 	print 'First ping KO saved for entity '.$conf->entity;
 }
diff --git a/htdocs/install/inc.php b/htdocs/install/inc.php
index 96348c2e272..2e7099d84b8 100644
--- a/htdocs/install/inc.php
+++ b/htdocs/install/inc.php
@@ -412,7 +412,9 @@ function pHeader($subtitle, $next, $action = 'set', $param = '', $forcejqueryurl
     }
     print '</span>'."\n";
 
-    print '<form name="forminstall" style="width: 100%" action="'.$next.'.php'.($param?'?'.$param:'').'" method="POST">'."\n";
+    print '<form name="forminstall" style="width: 100%" action="'.$next.'.php'.($param?'?'.$param:'').'" method="POST"';
+    if ($next == 'step5') print ' autocomplete="off"';
+    print '>'."\n";
     print '<input type="hidden" name="testpost" value="ok">'."\n";
     print '<input type="hidden" name="action" value="'.$action.'">'."\n";
 
diff --git a/htdocs/install/step2.php b/htdocs/install/step2.php
index 6ddd999ea59..46c84a01351 100644
--- a/htdocs/install/step2.php
+++ b/htdocs/install/step2.php
@@ -632,6 +632,25 @@ dolibarr_install_syslog("Exit ".$ret);
 
 dolibarr_install_syslog("- step2: end");
 
+
+$out  = '<input type="checkbox" name="dolibarrpingno" id="dolibarrpingno" value="checked" checked="true"> ';
+$out .= $langs->trans("MakeAnonymousPing");
+
+$out .= '<!-- Add js script to manage the uncheck of option to not send the ping -->';
+$out .= '<script type="text/javascript">';
+$out .= 'jQuery(document).ready(function(){';
+$out .= '  document.cookie = "DOLINSTALLNOPING_'.md5($dolibarr_main_instance_unique_id).'=0; path=/"'."\n";
+$out .= '  jQuery("#dolibarrpingno").click(function() {';
+$out .= '    if (! $(this).is(\':checked\')) {';
+$out .= '      console.log("We uncheck anonymous ping");';
+$out .= '      document.cookie = "DOLINSTALLNOPING_'.md5($dolibarr_main_instance_unique_id).'=1; path=/"'."\n";
+$out .= '    }';
+$out .= '  });';
+$out .= '});';
+$out .= '</script>';
+
+print $out;
+
 pFooter($ok?0:1, $setuplang);
 
 if (isset($db) && is_object($db)) $db->close();
diff --git a/htdocs/install/step4.php b/htdocs/install/step4.php
index 734d63fade9..342ec82d0fd 100644
--- a/htdocs/install/step4.php
+++ b/htdocs/install/step4.php
@@ -80,7 +80,7 @@ $db=getDoliDBInstance($conf->db->type, $conf->db->host, $conf->db->user, $conf->
 if ($db->ok)
 {
     print '<tr><td><label for="login">'.$langs->trans("Login").' :</label></td><td>';
-	print '<input id="login" name="login" type="text" value="' . (!empty($_GET["login"]) ? GETPOST("login") : (isset($force_install_dolibarrlogin) ? $force_install_dolibarrlogin : '')) . '"' . (@$force_install_noedit == 2 && $force_install_dolibarrlogin !== null ? ' disabled' : '') . '></td></tr>';
+	print '<input id="login" name="login" type="text" value="' . (!empty($_GET["login"]) ? GETPOST("login", 'alpha') : (isset($force_install_dolibarrlogin) ? $force_install_dolibarrlogin : '')) . '"' . (@$force_install_noedit == 2 && $force_install_dolibarrlogin !== null ? ' disabled' : '') . '></td></tr>';
     print '<tr><td><label for="pass">'.$langs->trans("Password").' :</label></td><td>';
     print '<input type="password" id="pass" name="pass" autocomplete="new-password"></td></tr>';
     print '<tr><td><label for="pass_verif">'.$langs->trans("PasswordAgain").' :</label></td><td>';
diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index da28ec88538..1b4badc39b5 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -1935,4 +1935,5 @@ AtLeastOneDefaultBankAccountMandatory=At least 1 default bank account must be de
 RESTRICT_API_ON_IP=Allow available APIs to some host IP only (wildcard not allowed, use space between values). Empty means every hosts can use the available APIs.
 RESTRICT_ON_IP=Allow access to some host IP only (wildcard not allowed, use space between values). Empty means every hosts can access.
 BaseOnSabeDavVersion=Based on the library SabreDAV version
-NotAPublicIp=Not a public IP
\ No newline at end of file
+NotAPublicIp=Not a public IP
+MakeAnonymousPing=Make an anonymous Ping '+1' to the Dolibarr foundation server (done 1 time only after installation) to allow the foundation to count the number of Dolibarr installation.
\ No newline at end of file
diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 375c7e4ea23..620a4b4e7f6 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -2205,7 +2205,7 @@ if (! function_exists("llxFooter"))
 	 */
 	function llxFooter($comment = '', $zone = 'private', $disabledoutputofmessages = 0)
 	{
-		global $conf, $langs, $user, $object;
+		global $conf, $db, $langs, $user, $object;
 		global $delayedhtmlcontent;
 		global $contextpage, $page, $limit;
 
@@ -2334,65 +2334,62 @@ if (! function_exists("llxFooter"))
 		// Add code for the asynchronous anonymous first ping (for telemetry)
 		if (($_SERVER["PHP_SELF"] == DOL_URL_ROOT.'/index.php') || GETPOST('forceping', 'alpha'))
 		{
+			//print '<!-- instance_unique_id='.$conf->file->instance_unique_id.' MAIN_FIRST_PING_OK_ID='.$conf->global->MAIN_FIRST_PING_OK_ID.' -->';
 			if (empty($conf->global->MAIN_FIRST_PING_OK_DATE)
-			|| (! empty($conf->file->instance_unique_id) && (md5($conf->file->instance_unique_id) != $conf->global->MAIN_FIRST_PING_OK_ID))
+			|| (! empty($conf->file->instance_unique_id) && (md5($conf->file->instance_unique_id) != $conf->global->MAIN_FIRST_PING_OK_ID) && ($conf->global->MAIN_FIRST_PING_OK_ID != 'disabled'))
 			|| GETPOST('forceping', 'alpha'))
 			{
-				print "\n".'<!-- Includes JS for Ping of Dolibarr MAIN_FIRST_PING_OK_DATE = '.$conf->global->MAIN_FIRST_PING_OK_DATE.' MAIN_FIRST_PING_OK_ID = '.$conf->global->MAIN_FIRST_PING_OK_ID.' -->'."\n";
-				print "\n<!-- JS CODE TO ENABLE the anonymous Ontime Ping -->\n";
-				?>
-	    			<script>
-	    			jQuery(document).ready(function (tmp) {
-	    				$.ajax({
-	    					  method: "POST",
-	    					  url: "https://ping.dolibarr.org/",
-	    					  timeout: 500,     // timeout milliseconds
-	    					  cache: false,
-	    					  data: { hash_algo: "md5", hash_unique_id: "<?php echo md5('dolibarr'.$conf->file->instance_unique_id); ?>", action: "dolibarrping", version: "<?php echo (float) DOL_VERSION; ?>", entity: <?php echo (int) $conf->entity; ?> },
-	    					  success: function (data, status, xhr) {   // success callback function (data contains body of response)
-	      					    	console.log("Ping ok");
-	        	    				$.ajax({
-	      	    					  method: "GET",
-	      	    					  url: "<?php echo DOL_URL_ROOT.'/core/ajax/pingresult.php'; ?>",
-	      	    					  timeout: 500,     // timeout milliseconds
-	      	    					  cache: false,
-	      	        				  data: { hash_algo: "md5", hash_unique_id: "<?php echo md5($conf->file->instance_unique_id); ?>", action: "firstpingok" },
-	    					  		});
-	    					  },
-	    					  error: function (data,status,xhr) {   // success callback function
-	        					    console.log("Ping ko: " + data);
-	        	    				$.ajax({
-	        	    					  method: "GET",
-	        	    					  url: "<?php echo DOL_URL_ROOT.'/core/ajax/pingresult.php'; ?>",
-	        	    					  timeout: 500,     // timeout milliseconds
-	        	    					  cache: false,
-	        	        				  data: { hash_algo: "md5", hash_unique_id: "<?php echo md5($conf->file->instance_unique_id); ?>", action: "firstpingko", version: "<?php echo (float) DOL_VERSION; ?>" },
-	      					  		});
-	    					  }
-	    				});
-	    			});
-	    			</script>
-				<?php
+				if (empty($_COOKIE['DOLINSTALLNOPING_'.md5($conf->file->instance_unique_id)]))
+				{
+					print "\n".'<!-- Includes JS for Ping of Dolibarr MAIN_FIRST_PING_OK_DATE = '.$conf->global->MAIN_FIRST_PING_OK_DATE.' MAIN_FIRST_PING_OK_ID = '.$conf->global->MAIN_FIRST_PING_OK_ID.' -->'."\n";
+					print "\n<!-- JS CODE TO ENABLE the anonymous Ontime Ping -->\n";
+					$hash_unique_id = md5('dolibarr'.$conf->file->instance_unique_id);
+					?>
+		    			<script>
+		    			jQuery(document).ready(function (tmp) {
+		    				$.ajax({
+		    					  method: "POST",
+		    					  url: "https://ping.dolibarr.org/",
+		    					  timeout: 500,     // timeout milliseconds
+		    					  cache: false,
+		    					  data: { hash_algo: "md5", hash_unique_id: "<?php echo $hash_unique_id; ?>", action: "dolibarrping", version: "<?php echo (float) DOL_VERSION; ?>", entity: <?php echo (int) $conf->entity; ?> },
+		    					  success: function (data, status, xhr) {   // success callback function (data contains body of response)
+		      					    	console.log("Ping ok");
+		        	    				$.ajax({
+		      	    					  method: "GET",
+		      	    					  url: "<?php echo DOL_URL_ROOT.'/core/ajax/pingresult.php'; ?>",
+		      	    					  timeout: 500,     // timeout milliseconds
+		      	    					  cache: false,
+		      	        				  data: { hash_algo: "md5", hash_unique_id: "<?php echo $hash_unique_id; ?>", action: "firstpingok" },
+		    					  		});
+		    					  },
+		    					  error: function (data,status,xhr) {   // success callback function
+		        					    console.log("Ping ko: " + data);
+		        	    				$.ajax({
+		        	    					  method: "GET",
+		        	    					  url: "<?php echo DOL_URL_ROOT.'/core/ajax/pingresult.php'; ?>",
+		        	    					  timeout: 500,     // timeout milliseconds
+		        	    					  cache: false,
+		        	        				  data: { hash_algo: "md5", hash_unique_id: "<?php echo $hash_unique_id; ?>", action: "firstpingko", version: "<?php echo (float) DOL_VERSION; ?>" },
+		      					  		});
+		    					  }
+		    				});
+		    			});
+		    			</script>
+					<?php
+				}
+				else
+				{
+					$now = dol_now();
+					print "\n<!-- NO JS CODE TO ENABLE the anonymous One time Ping. It was disabled -->\n";
+					include_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
+					dolibarr_set_const($db, 'MAIN_FIRST_PING_OK_DATE', dol_print_date($now, 'dayhourlog', 'gmt'));
+					dolibarr_set_const($db, 'MAIN_FIRST_PING_OK_ID', 'disabled');
+				}
 			}
 		}
 
 		print "</body>\n";
 		print "</html>\n";
-
-        ?>
-
-		<!-- Disabled. This creates a lot of regression. A better solution is to add a protection on submitted page to avoid action to be done twice.
-        <script type="text/javascript">
-            //Prevent from multiple form sending
-            $(function() {
-                $('input[type=submit]').click(function(e) {
-                    e.preventDefault();
-                    $(this).prop('disabled', true);
-                    $(this).closest('form').submit();
-                });
-            });
-        </script>
-        -->
-        <?php
     }
 }