Firefox Website Extension Changes New Addon Tab URL

Question

I created an add-on for Firefox and Chrome. In Chrome, the address bar is empty, so I want Firefox too.

If I click on the "new tab" in the address bar will be listed following the URL: moz-extension://5a4137a2-ede8-4f1d-838c-20069831ab38/index.html. Can I change this to something else? An empty address bar will be large.

This is my manifest.json

...
  "chrome_url_overrides" : {
    "newtab": "index.html"
  },

  "permissions": [
    "activeTab"
  ],
...

Answer 1

A bug appeared in Firefox that did not clear the address bar, but fixed with Firefox 57.

, <title> HTML- . manifest.json:

, URL- "moz-extension://...".