Examine source code of Rick Roll Blocker

{
  "manifest_version": 2,
  "name": "Rick Roll Blocker",
  "version": "1.1",
  "description": "Never be Rick Rolled by internet denizens again with this extension!",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self';",
  "icons": {
    "48": "icons/rick-48.png"
  },
  "background": {
    "scripts": [
      "background-bundle.js",
      "shared-bundle.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/rick-32.png",
    "default_title": "Rick Roll Blocker",
    "default_popup": "popup.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ]
}