I have .htaccess

RewriteEngine On
RewriteCond %{THE_REQUEST} /([^.]+)\.php [NC]
RewriteRule ^ /%1 [NC,L,R]
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^ %{REQUEST_URI}.php [NC,L]

I have ajax code looks like this

 $.ajax({
        type: "POST",
        url: "contact-submit",          
        data: "name=" + name + "&email=" + email,           
        success : function(text){              
            if (text == "success"){                 
                formSuccess();                  
            } else {
                formError(text);                   
            }
        }
    });

in chrome (this code works)

  url: "contact-submit",  

in safari (this code works)

  url: "contact-submit.php",  

chrome code does not work on safari and safari code doesn't work on chrome

What should I do? please help