javascript - Programmatically (or optionally) override Chrome's New Tab page

Question

I've written a Chrome extension that overrides the New Tab page:

manifest.json:

  "chrome_url_overrides": {
    "newtab": "new-tab.html"
  },

Is there a way to make this override optional? That is, I'd like to enable the user to uncheck a checkbox in the options page and disable the New Tab override. This must be possible because when I open a new tab for the first time, there's a popup informing of an extension changing the New Tab settings and asking whether to keep changes or restore settings:

I couldn't find any API for controlling overrides. The New Tab Redirect project doesn't have an option to display the native New Tab.

Answer 1

Google made a Star Wars new tab replacement which allows you to view the default new tab page. The url it uses is chrome-search://local-ntp/local-ntp.html.

Example:

options.html:

<input type="checkbox"> Use default new tab page

options.js:

var checkbox = document.querySelector("input[type=checkbox]")
checkbox.addEventListener("click", function() {
 chrome.storage.sync.set({ defaultnewtab: checkbox.checked })
})

newtab.js:

chrome.storage.sync.get("defaultnewtab", function(storage) {
 if(storage.defaultnewtab) {
  chrome.tabs.update({ url: "chrome-search://local-ntp/local-ntp.html" })
 }
})