FiddlerScript function adds a SSCookie column to show the SameSite attribute for Set-Cookie response headers

ShowSameSiteCookieInfo.js

	public static BindUIColumn("SSCookie", 60, 5)
	function FillSSCookieInfoColumn(oS: Session): String {
		if (oS.state < SessionStates.ReadingResponse) return "";
		if (!oS.ResponseHeaders.Exists("Set-Cookie")) return "";
		
		var sbVals = new System.Text.StringBuilder();
		for (var i=0; i<oS.ResponseHeaders.Count(); i++){
			var thisHeader = oS.ResponseHeaders[i];
			if (!StringExtensions.OICEquals(thisHeader.Name, "Set-Cookie")) continue;
			if (!StringExtensions.OICContains(thisHeader.Value, "samesite")) { sbVals.Append("+ "); continue; }
			var thisOne = Utilities.TrimBefore(thisHeader.Value.ToLower(), "samesite");
			thisOne = Utilities.TrimAfter(Utilities.TrimAfter(thisOne, ";"), " ");
			
			if (StringExtensions.OICContains(thisOne, "none") &&
				(!oS.isHTTPS || 
				!StringExtensions.OICContains(thisHeader.Value, "secure")) ){
				// SameSite=none cookies will be disallowed if not marked Secure
				sbVals.Append("!!!!");
			}
			
			sbVals.Append(thisOne + " ");
		}	
		return sbVals.ToString();
	}