url rewrite works perfectly in IE and edge but not working in firefox or chrome

Hello,

I have following code: it works perfectly and redirects to other host name or site in IE and IE edge but not working in chrome or firefox...what is incorrect here. please help

<rule name="Redirect rule" patternSyntax="ECMAScript" stopProcessing="true"><match url=".*"></match><conditions><add input="{HTTP_HOST}" pattern="myhostname.com$" /><add input="{HTTPS}" pattern="off" /></conditions><action type="Redirect" url="http://www.otherhostname.com/{R:0}" appendQueryString="true" redirectType="Permanent"></action></rule>