Examine source code of Readament

{
  "manifest_version": 2,
  "name": "Readament",
  "version": "1.1.0",
  "icons": {
    "16": "assets/icons/icon-16x16.png",
    "32": "assets/icons/icon-32x32.png",
    "48": "assets/icons/icon-48x48.png",
    "64": "assets/icons/icon-64x64.png",
    "128": "assets/icons/icon-128x128.png"
  },
  "description": "Readament",
  "homepage_url": "https://www.readament.com",
  "short_name": "Readament",
  "browser_action": {
    "default_icon": "assets/icons/icon-32x32.png",
    "default_title": "Save to Readament"
  },
  "permissions": [
    "activeTab",
    "https://www.readament.com/*",
    "cookies"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "author": "tanavamsikrishna",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "js/background.bundle.js"
    ]
  },
  "web_accessible_resources": [
    "selector_popup.html",
    "sign_in_popup.html"
  ]
}