Examine source code of Nightshade Barriers

{
  "name": "Nightshade Barriers",
  "version": "1.0",
  "description": "A lightweight ad and tracker blocker that keeps malicious scripts from loading, speeding up your browsing and protecting your privacy.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "http://*/",
    "https://*/"
  ],
  "icons": {
    "48": "icon48.png"
  },
  "background": {
    "scripts": [
      "blocked_domains.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "manifest_version": 2
}