background.js

let urls = {};

let menu = {
  search: () => {
    let q = prompt();
    q &&
      chrome.tabs.create({
        url: "http://www.imdb.com/find?s=all&q=" + encodeURIComponent(q)
      });
  },
  history: () => {
    chrome.tabs.create({ url: "chrome://history/#q=imdb.com/title/tt" });
  }
};

Object.keys(menu).forEach(item => {
  chrome.contextMenus.create({
    id: item,
    title: chrome.i18n.getMessage("menu_" + item),
    contexts: ["page_action"]
  });
});

chrome.contextMenus.onClicked.addListener(info => {
  menu[info.menuItemId]();
});

chrome.runtime.onMessage.addListener((req, sender) => {
  urls[sender.tab.id] = req.url;
  chrome.pageAction[req.url ? "show" : "hide"](sender.tab.id);
});

chrome.pageAction.onClicked.addListener(tab => {
  chrome.windows.create({
    url: urls[tab.id],
    type: "popup",
    state: "fullscreen"
  });
});