old_contents: chrome.contextMenus.create({
      title: "Create draaft: %s",
      contexts: ["selection"],
  
      onclick: function(info, tab) {
          window.open('http://alpha.draaft.co/imports/element?quote=' + encodeURIComponent(info.selectionText || '') + '&url=' + encodeURIComponent(info.pageUrl));
      }
  });
new_contents: chrome.contextMenus.create({
      title: "Create draaft: %s",
      contexts: ["selection"],
  
      onclick: function(info, tab) {
          window.open('http://alpha.draaft.co/bookmark?quote=' + encodeURIComponent(info.selectionText || '') + '&url=' + encodeURIComponent(info.pageUrl));
      }
  });
subject: use /bookmark resource