background.html

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.3/jquery.min.js"></script>
<script src="jquery.url.js"></script>
<script>
function createContextMenu() {
	// This is just to set up the context menus for the first time
	var CMcurrentPathName="";
	var CMcurrentPathUrl="";
	var CMcountLinks=0;
	var CMcMenu=new Array();
	chrome.contextMenus.removeAll();
	if (localStorage.getItem('links')) { 
		var CMstringLSRead=localStorage.getItem('links'); // get String for 'url' from Local Storage
		var CMjsonLSRead=JSON.parse(CMstringLSRead); // parse string to get JSON array
		$.each(CMjsonLSRead.links, function() {
			CMcountLinks++;	
			CMcurrentPathName=this.pathName;
			CMcurrentPathUrl=this.pathUrl;
			if (CMcurrentPathUrl==0) {
				CMcMenu[CMcountLinks]=chrome.contextMenus.create({"title": CMcurrentPathName });
			}else{
				CMcMenu[CMcountLinks]=chrome.contextMenus.create({"title": " - "+CMcurrentPathName, "onclick": goCMPath });
			}
		});
	} else {// If the link store is empty, use the default
		cMenu[0]=chrome.contextMenus.create({"title": "root", "onclick": goCMPath(1)});
	}
}

createContextMenu();

function goCMPath(cmId) {
	chrome.tabs.getSelected(null,function(tab) {
		var currentPathUrl="";
		if (localStorage.getItem('links')) { 
			var countLinks=0;
			var stringLSRead=localStorage.getItem('links'); // get String for 'url' from Local Storage
			var jsonLSRead=JSON.parse(stringLSRead); // parse string to get JSON array
			$.each(jsonLSRead.links, function() {
				countLinks++;
				if(countLinks==cmId.menuItemId){
					currentPathUrl=this.pathUrl;
				}
			});
		}
	    var tablink = tab.url;
	    var url=$.url(tablink);
	    var urlProtocol=url.attr('protocol');
	    var urlHost=url.attr('host');
	    var urlDomain=urlProtocol+"://"+urlHost;
	    var newUrl=urlDomain+currentPathUrl
   		chrome.tabs.update(tab.id, {url: newUrl});
	});
}
</script>