Examine source code of Paper: New tab notebook

{
  "manifest_version": 2,
  "name": "Paper: New tab notebook",
  "version": "2.2",
  "description": "Clean, simple interface to write notes",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "chrome_url_overrides": {
    "newtab": "note.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "paper-firefox-addon@test.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "background.js"
      ]
    }
  ]
}